What's new in 7.6 (2022-Oct-17 13:55):

*) bgp - added support for BGP advertisement displaying (CLI only);
*) bgp - fixed reporting of session uptime;
*) bgp - improved session establishment speed after bootup;
*) bonding - fixed ARP monitor packets with bond's MAC address;
*) bonding - improved interface stability on slave configuration changes;
*) bonding - reduce "actual-mtu" according to interface "l2mtu";
*) branding - execute "autorun.scr" file when installing branding package;
*) capsman - fixed RADIUS accounting when EAP is used;
*) certificate - fixed SHA1 certificate name lookup;
*) certificate - improved certificate management, signing and storing processes;
*) certificate - restricted maximum retry attempt window for Let's Encrypt certificate to 60 minutes;
*) container - added "start-on-boot" parameter for automatic container startup;
*) container - allow changing container related parameters while it is running;
*) container - fixed usage of non-authenticated registries;
*) dhcpv4-server - fixed matcher functionality;
*) dhcpv4-server - fixed RADIUS accounting for local leases;
*) dhcpv4-server - improved service stability when removing dynamic leases;
*) dhcpv6-client - fixed false error status reporting when server offers T1 or T2 value as 0;
*) dns - added "match-subdomain" option for static entries (CLI only);
*) dot1x - fixed incorrect error when using "mac-auth";
*) ethernet - added "5Gbps" option for speed setting;
*) firewall - added "src/dst-address-type" parameter under "IPv6/Firewall/Mangle" menu;
*) firewall - disable IRC NAT helper on upgrade;
*) firewall - fixed IPv6 filtering with "in/out-interface" matcher that is in VRF;
*) firewall - fixed IRC NAT helper (CVE-2022-2663);
*) firewall - fixed usage of "netmap" action for IPv6 source NAT;
*) health - fixed fan speed and temperature reporting on CCR1072;
*) health - improved voltage reading on RBmAP-2nD;
*) hotspot - fixed service initialization when HTML directory configured on an external disk;
*) hotspot - fixed SSL usage on all HotSpot pages;
*) hotspot - improved stability when receiving bogus packets;
*) hotspot - limit maximum allowed connections based on free RAM resources;
*) hotspot - removed "routerboard.com" URL from default HotSpot advertise;
*) interface - added warning when interface has configured "mtu" higher than "l2mtu";
*) ipsec - added "invalid-packets" counter for Installed SA's menu;
*) ipsec - fixed packet processing by hardware encryption engine on MMIPS devices;
*) l3hw - added "l3hw-settings" sub menu under the switch menu;
*) l3hw - added support for IPv6 route offloading (disabled by default);
*) l3hw - fixed "H" flag presence for accelerated connection tracking entries;
*) l3hw - fixed possible packet loss when using HW offloaded NAT;
*) l3hw - improved connected host offloading on startup;
*) l3hw - improved connected IPv6 host offloading when routing table is nearly full for 98DX224S, 98DX226S, and 98DX3236 switch chips;
*) l3hw - improved system stability;
*) l3hw - made route offloading selection work only on unicast;
*) lte - added interface name in MTU debug logging message;
*) lte - added periodic IPv6 RS to trigger IPv6 adress acquisition for non-MBIM modems;
*) lte - added support for Neoway N75-EA;
*) lte - added support to perform FOTA upgrade from local file for EG12-EA, EG18-EA, RG502Q-AE, EG06-A, EP06-A modems;
*) lte - disabled RPLMN on Chateau 5G;
*) lte - fixed at-chat on Telit FN980m;
*) lte - fixed handover from UMTS to LTE when PS activation had failed for MBIM modems;
*) lte - fixed MBIM modem initialization;
*) lte - fixed re-attaching on PS detach for MBIM modems;
*) lte - removed reconnect delay after receiving DETACH notification for MBIM modems;
*) macsec - added configuration support with VLAN, ARP, DHCP and bridge tagging/untagging;
*) macsec - added logging support with "debug" and "dot1x" topics;
*) macsec - added support for MTU and L2MTU;
*) macsec - fixed interface after Ethernet link down;
*) macsec - fixed interface statistics and missing properties;
*) macsec - fixed interface status;
*) macsec - fixed multiple interface creation on different Ethernet ports
*) macsec - improved interface stability;
*) macsec - improved system stability for TILE and RB5009 devices;
*) macsec - removed interface from SMIPS devices;
*) mac-telnet - respect interface MTU setting when sending packets for MAC-Telnet and MAC-WinBox;
*) netwatch - fixed string variable values in script;
*) ntp - improved initial synchronization speed after bootup;
*) ospf - added SHA hashing for authentication;
*) ospf - fixed area "no-summary" setting;
*) ospf - fixed checksum calculation;
*) ospf - fixed displaying of VRF interface in related logs;
*) ospf - fixed transmit of LSA/ACK's on p2p interfaces;
*) ospf - improved logging when invalid configuration is detected;
*) ospf - refresh OSPFv3 interface configuration when IPv6 network becomes available;
*) ovpn - added IPv6 support;
*) ovpn - added VRF support for client;
*) ppp - fixed memory leak;
*) ppp - improved service stability when multiple users disconnect simultaneously;
*) pppoe - fixed MRU negotiation even when it is set to 1500;
*) qsfp - added interface temperature warnings and shutdown;
*) queue - improved stability for CAKE type queues;
*) radius - require "policy" policy for "login" service configuration;
*) rip - fixed passwordless MD5 authentication;
*) route-filter - fixed filtering for multiple community routes;
*) route-filter - fixed memory allocation when moving entries;
*) route - fixed disappearance of inactive static routes after upgrade;
*) route - fixed memory leak;
*) routerboard - return router's short name in "model" parameter;
*) routerboard - set "Delete" as default key to enter booter menu ("/system routerboard upgrade" required);
*) serial - added support for newer PL2303 serial controllers;
*) sfp - improved QSFP/SFP interface stability for 98DXxxxx and 98PX1012 switches;
*) sms - added "status-report-request" parameter for "send" command;
*) sms - fixed handling of SMS send attempts on unsupported modems;
*) snmp - improved retrieval of routing related OID's;
*) snmp - improved stability when receiving bogus packets;
*) ssh - increased key generation timeout;
*) sstp - added VRF support for client;
*) supout - added tr069-client section;
*) supout - removed duplicate "bridge-controller" section;
*) switch - improved traffic forwarding at 5Gbps rate for 98DX8525, 98DX4310 switches;
*) system - renamed error messages when trying to edit or remove dynamic entries;
*) tile - improved system stability when processing packets;
*) tr069-client - do not allow ":" symbols in username;
*) tr069-client - fixed reporting of "X_MIKROTIK_MimoRSRP" parameter;
*) user-manager - accept any username for outer authentication;
*) user-manager - added "comment" parameter for batch user creation;
*) user-manager - added support for multiple accounting sessions;
*) user-manager - added variables to print profile name and end time in voucher templates;
*) user-manager - allow specifying router's address as subnet;
*) user-manager - fixed "migrate-legacy-db" command;
*) user-manager - fixed session expiry when it is stopped by Disconnect-Request;
*) user-manager - forced username verification against client's certificate for EAP-TLS;
*) user-manager - use "Class" attribute to associate user's accounting session;
*) user - removed unused "dude" policy;
*) vrrp - fixed connection tracking synchronization on MMIPS and MIPSBE devices;
*) vxlan - added IPv6 support for remote VTEPs (only IPv4 or IPv6 will be used at the same time, use "vteps-ip-version" property on VXLAN interface to change the version);
*) w60g - improved system stability (introduced in v7.5);
*) webfig - fixed creation of new IPv6 routes;
*) webfig - fixed displaying of "Last Seen" parameter under "IP/DHCP Server/Leases" menu;
*) webfig - fixed hex input for "Host Uniq" field;
*) webfig - fixed unsetting of "endpoint-address" parameter under "WireGuard/Peers" menu;
*) wifiwave2 - fixed enabling of unconfigured interfaces;
*) wifiwave2 - fixed malfunction of WPA3 hash-to-element technique when enabled on multiple interfaces;
*) wifiwave2 - fixed RADIUS accounting after fast-transition;
*) wifiwave2 - fixed "WPA Key Data Length" value in EAPOL frame when FT-EAP-SHA384 AKM is used;
*) winbox - added "Active" prefix for current remote and local session ID fields for L2TP-Ether interfaces;
*) winbox - added "address-list" parameter under "IP/DNS/Static" menu;
*) winbox - added "File Name" option for "Load Config" parameter under "System/SwOS" menu;
*) winbox - added icon for TR069-client menu;
*) winbox - added MACsec support;
*) winbox - added quick filtering option for route list;
*) winbox - added "Rapid Commit" parameter support under "IPv6/DHCP-Server" menu;
*) winbox - added "Reset Traffic Counters" button for all interfaces;
*) winbox - added "type" and "status-report-request" parameters under "Tools/SMS" menu;
*) winbox - allow "timeout" value to be less than 1 under "Tools/Netwatch" menu;
*) winbox - allow to rename mounted disks;
*) winbox - changed order of tabs under "User Manager" menu;
*) winbox - changed "uptime" parameter format when using the wifiwave2 package;
*) winbox - do not show unavailable features on SMIPS devices;
*) winbox - fixed interface traffic graph drawing on RB5009;
*) winbox - fixed maximum allowed value for VRRP's "priority" parameter;
*) winbox - fixed "Session Uptime" value for not established sessions under "Routing/BGP" menu;
*) winbox - fixed "Session Uptime" value under "Routing/BGP" menu;
*) winbox - fixed "System/SwOS" window refreshing after changes are detected;
*) winbox - fixed "User Manager/User Profiles" window refreshing after changes are detected;
*) winbox - made "backup.swb" the default value for SwOS backup;
*) winbox - made sessions removable in "User Manager" menu;
*) winbox - show "F" flag for failed entries under "Interfaces/VRRP" menu;
*) winbox - show "Switch" menu on Chateau LTE18 ax;
*) winbox - show "System/Health" only on boards that have health monitoring;
*) winbox - show "System/RouterBOARD/Mode Button" on devices that have such feature;
*) wireguard - strip whitespaces from keys;
*) wireless - disallowed using "default" as scan list or channel names;
*) wireless - fixed incorrectly applied ingress priority to non-wireless packets;
*) wireless - fixed missing wireless interface on some RB921GS-5HPacD devices;
*) www - improved stability when receiving bogus packets;
*) x86 - improved ixgbe driver support;

What's new in 7.5 (2022-Aug-30 12:25):

*) bgp - fixed remote refuse capability options, max prefix limit errors and administrative stop;
*) bgp - improved stability when "default-originate" is configured;
*) bridge - fixed "new-priority" value validation for NAT rules;
*) capsman - added randomized range option for "reselect-interval" parameter (CLI only);
*) certificate - fixed handling of empty AKID by SCEP client;
*) console - fixed automatic command completion with keypress;
*) container - added support for running Docker (TM) containers on ARM, ARM64 and x86 (containers created before v7.4 must be recreated);
*) defconf - fixed loading of default configuration on RB4011 with WifiWave2 package enabled;
*) dhcpv4-server - fixed removal of dynamic leases when server is removed;
*) dhcpv6-client - moved invalid lifetime logging message from "debug" to "error" topic;
*) dhcpv6-client - use /128 prefix for IA_NA addresses;
*) dhcpv6-relay - fixed relay forwarding (introduced in v7.1.5);
*) dhcpv6-server - improved stability when acquiring binding;
*) dns - added "address-list" parameter for static DNS entries (CLI only);
*) dns - added "match-subdomain" option for static entries (CLI only);
*) firewall - added support for RTSP helper;
*) health - fixed "temperature" and "power-consumption" readings on RB1100x4;
*) health - improved voltage reading on CRS112-8P-4S;
*) health - renamed "cpu-temperature" to "switch-temperature" on CRS312-4C+8XG, CRS326-24S+2Q+, CRS354-48P-4S+2Q+, CRS354-48G-4S+2Q+, CRS504-4XQ-IN, CRS518-16XS-2XQ;
*) hostpot - fixed Walled Garden functionality for HTTPS sites;
*) hotspot - automatically reject all HTTPS requests passing through HotSpot server for unauthorized users;
*) hotspot - improved stability when receiving bogus packets;
*) hotspot - limit maximum allowed connections based on free RAM resources;
*) hotspot - removed "https-redirect" option;
*) ike2 - allow sending certificate chain as initiator;
*) interface - fixed default interface naming on RB1100x2;
*) l3hw - fixed HW offloaded NAT;
*) leds - fixed default LED configuration for RBwsAP-5Hac2nD;
*) leds - fixed wireless LED functionality on LHGG;
*) lora - do not ignore negative sign for spoofed GPS coordinates;
*) lte - added at-chat and NMEA port support for Simcom modems, USB composition (device id - 0x9003);
*) lte - added at-chat support for Simcom modems, USB composition (device id - 0x9005);
*) lte - added "SIM not inserted" and "SIM failure" messages to "status" and "monitor" commands for AT modems;
*) lte - changed cell ID info display to short format for 3G connections;
*) lte - disallow empty APN name only for default entry;
*) lte - fixed AT channel for Sierra Wireless modems with device ID 0x9091;
*) lte - fixed LTE interface presence for Telit LN940;
*) lte - fixed UDP performance on MMIPS devices;
*) lte - improved antenna scan for Chateau devices with switchable antennas;
*) lte - improved configuration export when multiple LTE interfaces are present;
*) lte - modem dialer, do not reset dialing sequence if modem reply with error to user set init-string;
*) netinstall - fixed Netinstall procedure for ARM devices;
*) netwatch - automatically start migrated probes from previous RouterOS versions;
*) netwatch - changed ICMP default packet loss fail threshold to 85%;
*) ntp - fixed NTP server when "use-local-clock" is used;
*) ospf - fixed handling of external forwarding address;
*) ospf - improved stability when interface is being disabled during database exchange;
*) ovpn - fixed encryption key renewal process which caused periodic session disconnects;
*) ovpn - improved system stability when hardware acceleration is used on ARM64 devices;
*) ovpn - moved disconnected user logging message from "debug" to "info" topic;
*) ping - improved service stability;
*) port - added support for D-Link DWM-222 in serial/PPP mode (device id - 0xac01/0x7e3d);
*) port - added support for Huawei/ZTE K5006z in serial/PPP mode (device id - 0x1017/0x1018);
*) ppp - improved service stability under high load;
*) ppp - use /32 as default netmask if not specified for "routes" parameter;
*) ptp - improved system stability on CRS devices;
*) quickset - removed PPTP and SSTP server addition for "VPN" checkbox;
*) rb5009 - fixed ether1 status reporting after system reboot;
*) route-filter - fixed "delete bgp-communities" command;
*) routerboard - added "reset-button" script feature for TILE devices;
*) sfp - fixed "eeprom" reading on single SFP port ARM devices;
*) sfp - fixed QSFP+ and QSFP28 interface disable when using breakout cable;
*) sfp - fixed unresponsive "sfp1" interface after disabling "ether1" on NetMetal devices;
*) sfp - improved combo SFP ports initialization handling on CRS312-4C+8XG, CRS328-4C-20S-4S+;
*) sfp - improved stability when using 2.5G optical modules in CCR2116, CCR2216 and CRS518;
*) snmp - fixed usage of VRF after system startup;
*) socks - fixed "dst-port" usage when checking access list;
*) ssh - added AES support for PEM decryption;
*) ssh - fixed importing of public keys;
*) ssh - fixed minor typo issue when importing public key;
*) sstp - fixed client stuck in "nonce matching" state;
*) switch - fixed ACL rules for 98DXxxxx switches with more than 28 ports (introduced in v7.3);
*) switch - removed limit for number of hardware-offloaded bonding interfaces;
*) swos - enabled SwitchOS support for CRS310-1G-5S-4S+;
*) swos - fixed SwOS upgrade procedure on CRS305-1G-4S+;
*) traceroute - added "do-not-fragment" parameter support (CLI only);
*) traceroute - increased packet size limit to 65535;
*) vrrp - added "sync-connection-tracking" compatibility with preemption-mode;
*) vrrp - fixed high CPU usage when "sync-connection-tracking=yes" and the backup router goes offline;
*) vrrp - fixed HW offloaded bridge MAC address learning when changing from VRRP master to backup;
*) vrrp - fixed initial connection tracking synchronization, a backup router now always receives all existing connections;
*) vrrp - improved connection tracking synchronization protocol (CTSYNC), the new protocol is incompatible with previous RouterOS versions with "sync-connection-tracking=yes";
*) webfig - allow to specify NTP server as domain name;
*) webfig - fixed displaying of grahs in status pages;
*) webfig - fixed floating point field's negative value in -0.*** format;
*) wifiwave2 - added "sae-pwe" parameter with hash-to-element mechanism for SAE PWE derivation;
*) wifiwave2 - added support for 802.11k;
*) wifiwave2 - disable wireless interface after wireless configuration reset;
*) wifiwave2 - fixed displaying of AKM in scan results;
*) wifiwave2 - fixed duplicated AKM in RSN message;
*) wifiwave2 - fixed group key update for client devices which connect via fast BSS transition;
*) wifiwave2 - fixed incorrect AKM usage for FT-WPA3-EAP-192;
*) wifiwave2 - fixed reassociation response sending for fast transition over DS;
*) wifiwave2 - fixed setting of "ft-nas-identifier" parameter;
*) wifiwave2 - fixed usage of Canada country setting on US locked devices;
*) wifiwave2 - improved default channel width selection for interfaces in station mode;
*) winbox - do not show previously attached LTE interfaces while establishing LTE connection;
*) winbox - enabled all filters by default under "Tools/Torch" menu;
*) winbox - fixed "Enable", "Disable" and "Comment" functions for L2TP-ether type interfaces;
*) winbox - fixed "Next Run" parameter displaying under "System/Scheduler" menu;
*) winbox - fixed "Type" and "Value" field displaying under "System/Health" sub-menu's;
*) winbox - show warning messages for BGP connection entries;
*) wireless - fixed interface initialization on x86 devices;
*) x86 - allow downgrading to RouterOS v6 only if it was previously installed;
*) x86 - fixed advertising of 2500M and 5000M link speeds on ixgbe driver;

ВНИМАНИЕ! ОБНОВЛЯЙТЕСЬ НА СВОЙ СТРАХ И РИСК! не забывайте делать резервные копии, а лучше проверяйте на не критически важном роутере. все под вашу ответственность!

UPD. Не все прошло так гладко, как хотелось бы) из-за ошибки нехватки места (not enough space for upgrade), обновиться успешно получилось только через Netinstall  и восстановлением заранее сохраненную конфигурацию. (кстати, вв enterboot лучше входить через команду в терминале /system routerboard settings set boot-device=try-ethernet-once-then-nand и перезагрузкой, чем кнопкой reset). Так что точно лучше взвесить все за и против перед обновлением.