MikroTik Release Notes

Name: MikroTik
Brand: MikroTik

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2 release notes curated from 1 source by the Releasebot Team. Last updated: Jul 6, 2026

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Jul 6, 2026
Date parsed from source:
Jul 6, 2026

First seen by Releasebot:
Jul 6, 2026
MikroTik

RouterOS 7.21.5 [long-term]

MikroTik ships 7.21.5 with a security fix and a broad round of stability and routing improvements across BGP, bridge, LTE, switch, VXLAN, and WinBox. The update also refines cloud backup handling, upgrade behavior, timezone data, and several device-specific fixes.
What's new in 7.21.5 (2026-Jul-03 13:23)

fixed a service security issue, home user with default config not affected, but we recommend the upgrade for all users regardless;

bfd - fixed delay on session print;

bgp - fixed advertisement print handling by "dst" when destination is in VRF;

bgp - fixed IPv6 End-of-Route processing;

bgp - improved stability on MP (multiprotocol) parsing;

bridge - fixed dynamic VLAN update for wifi interfaces;

bridge - fixed stability issue when using DHCPv4 snooping;

cloud - cloud backup file management now requires "policy" policy;

console - fixed unresponsiveness when entering safe-mode through the Windows 11 terminal;

container - fixed missing config.json issue when upgrading from version 7.20.8 or older;

disk - avoid reading SCSI stats all the time to allow disks to go to sleep;

ethernet - fixed stability issue with TSO on Alpine CPUs;

ethernet - improved system stability on devices with Alpine CPUs;

ipv6 - do not disable IPv6 FastPath when Traffic Flow is enabled;

isis - allow to configure metric-type;

isis - fixed missing "l2.lsp-refresh-interval" parameter;

l3hw - improved system stability on device shutdown/reboot;

lte - fixed cases where EC25-EU and EG25-G boards would receive packets with missing last 4 bytes;

lte - fixed crash on LTE passthrough interface deactivation;

ospf - fixed interface passive flag update in WinBox;

route - fixed static route flag handling by WinBox on disable;

route - removed deprecated "/routing/route/rule" menu;

switch - fixed issue with MAC table for RB2011 (introduced in v7.21);

switch - fixed rare possibility of tx-timeout or simultaneous flap of all switch ports on devices with Alpine CPUs;

switch - increase "ingress-rate" and "egress-rate" maximum value to 400G;

timezone - updated timezone information from "tzdata2026b" release;

upgrade - prevent package scheduling from interfering with the upgrade feature;

vxlan - fixed fast-path when using "checksum=no" (introduced in v7.20);

winbox - do not pre-fill "Allowed Address" and "Client Allowed Address" with "::/0" when adding new WireGuard Peer;

Original source
Apr 21, 2026
Date parsed from source:
Apr 21, 2026

First seen by Releasebot:
Jun 24, 2026
MikroTik

RouterOS 7.21.4 [long-term]

MikroTik ships RouterOS 7.21.4 with broad stability fixes across BGP, containers, LTE, WiFi, routing, and WinBox, plus bridge, firewall, PoE-out, and system improvements that smooth upgrades and everyday operation.
What's new in 7.21.4 (2026-Apr-21 09:49)

bgp - fixed stability issue when non-existent output select-chain was specified;

bgp-vpn - allow modifying scopes with routing filters;

bgp-vpn - fixed non-working import filter after reboot;

bgp-vpn - use target scope for imported route;

bridge - fixed missing dynamic "switch-cpu" VLAN entry in WiFi setup;

bridge - fixed performance regression in complex setups with vlan-filtering (introduced in v7.20);

console - removed the "reset" command from shared settings menus (IP/IPv6/Bridge/L3HW/Neighbor-Discovery/Connection-Tracking);

container - fixed issue where the container might not start after upgrading if root-dir was not set;

container - improved error message if a container fails to start;

defconf - fixed L009 configuration (introduced in v7.21);

ethernet - fixed false excessive broadcast warning (introduced in v7.20);

firewall - improved system stability;

ipsec - improved aes256-ctr stability on L009;

ipsec - removed modp8192 proposal on MIPS architectures;

ipv6,ra - use received prefix when RA on-link flag is 0;

isis - improved stability with fragmented CSNP;

l2tp - improved system stability on TILE architecture;

l3hw - fixed missing VLAN counters after reboot (introduced in v7.21);

l3hw - fixed stability issue (introduced in v7.21);

leds - fixed default LED configuration for CCR2004-1G-12S+2XS;

log - do not provide non-existent logging topics for configuration;

lte - fixed framed route support for the first APN;

lte - fixed missing automatic redial when cellular connectivity is lost for R11e-LTE;

lte - fixed user set MTU not applied to LTE interface;

lte - override the "auto" or 0 MTU in "interface" menu to 1500;

ospf - fixed typos in log messages;

ospf - improved stability on configuration change;

ovpn - fixed OVPN push routes;

poe-out - firmware update for CRS354-48P-4S+2Q+ (the update will cause a brief power interruption to poe-out interfaces);

poe-out - fixed rare PoE-Out firmware upgrade failure on CRS354-48P-4S+2Q+;

ptp - allow manual domain configuration for 802.1AS profile;

ptp - set DSCP (EF) for the default profile when using IPv4;

qos-hw - display queue0 limits for CPU port;

qos-hw - fixed "offline" tx-manager ability to queue at least one packet (introduced in v7.21);

qos-hw - prohibit setting CPU port with "offline" tx-manager;

route - added SLAAC route redistribution for IPv6 capable routing protocols;

route - do not set blackhole flag for synthetic routes;

route - improved service stability when removing routes;

routerboard - fixed applying settings via WinBox on devices with fixed CPU frequency;

routing-filter - added possibility to match SLAAC and bgp-mpls-vpn route types;

ssh - make login process asynchronous;

switch - fixed stability issue when changing bridge multicast-router property on CRS1xx/2xx (introduced in v7.19);

system - added FCC Part 15 Compliance label to "System/Regulatory" menu;

system - improved stability for internal RouterOS service communication;

system - improved system stability;

system - improved upgrade service stability when the server is unreachable;

system - included full certificate chain to Windows executables;

user - properly apply login delay (introduced in v7.20);

wifi-mediatek - fixed communication issues on 802.11ax access points with Intel clients;

wifi-mediatek - fixed HE capabilities IE on 2GHz band;

winbox - fixed "Remote AS" setting under the "Routing/BGP/Connections" menu;

winbox - fixed "Src/Dst Address Type" under the "IP/Firewall/NAT" menu;

winbox - fixed L3HW default value for VLAN interface (introduced in v7.21);

winbox - properly display multiple bands for multi-link interface clients under registration table;

winbox - rearrange filter wizard parameters in tabs;

www - improved service stability when cancelling REST API sessions;

Original source
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