CVE-2026-67281: MikroTik RouterOS WebFig reads files, including credentials, without login

High 8.7 EPSS 0.7% MikroTik RouterOS

A stale pointer in a new WebFig session lets an unauthenticated attacker read files outside the WebFig directory through the /jsproxy path, including configuration stores that hold credentials. The CVE record lists RouterOS 7.20 up to the fixes in 7.23.4 and 7.24.2; the RouterOS 6.49.22 changelog also lists this CVE. CISA's enrichment rated it automatable with a public proof of concept. Stolen credentials can be used to log in and add users, so change passwords after updating if WebFig was reachable.

CVE-2026-67281CVE identifier
8.7CVSS 4.0 base score (high)
0.7%EPSS: chance of exploitation in the next 30 days (higher than 54% of CVEs)
2026-09-05published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run MikroTik RouterOS and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Installing a RouterOS update always reboots the router. On RouterBOARD hardware, run /system routerboard upgrade afterwards and reboot a second time so the matching RouterBOOT firmware is loaded. Plan for two short outages and make sure you have out-of-band or local access in case the router does not come back.
If you cannot patch today, apply the temporary mitigation below and patch as soon as possible.

Affected and fixed versions

Affected:

RouterOS 7.20 before 7.23.4
RouterOS 7.24 before 7.24.2
RouterOS 6.49.22 changelog lists a fix for this CVE: run 6.49.22 or later on RouterOS 6

Fixed in:

RouterOS 7.23.4
RouterOS 7.24.2
RouterOS 6.49.22 (per changelog)
Recommended as of 3 Nov 2026: 7.25 (stable), 7.24.6 (long-term) or 6.49.23

Am I affected?

/system resource print   # version, architecture-name, board-name
/system package update print   # channel, installed-version, latest-version
/system routerboard print   # current-firmware vs upgrade-firmware (not on CHR/x86)
/ip service print   # which management services are enabled, and from where
/ip service print where name~"www"   # www (HTTP) and www-ssl (HTTPS) serve WebFig

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Built from source

# RouterOS CLI (works on v6 and v7; v7 also accepts /system/package/update/...)
# Current releases as of 3 Nov 2026: 7.25 (stable), 7.24.6 (long-term), 6.49.23 (RouterOS 6)
/system backup save name=pre-update
/export file=pre-update
/system package update set channel=long-term   # or stable
/system package update check-for-updates
/system package update print   # status should say: New version is available
/system package update install   # downloads, installs and REBOOTS the router
# after it is back up:
/system resource print   # confirm the new version
/system routerboard upgrade   # RouterBOARD only: new RouterBOOT firmware
/system reboot   # REBOOTS again to load the firmware

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

If you cannot patch yet

Updating is the fix. If you manage the router with WinBox or SSH only, disable the web interface: /ip service disable www,www-ssl
Otherwise restrict it: /ip service set www-ssl available-from=192.0.2.0/24 (address= before RouterOS 7.24) and drop TCP 80/443 from untrusted networks in the firewall input chain.
If WebFig was reachable from untrusted networks, change all router passwords and keys after updating.

Look for signs of exploitation

Unusual requests to /jsproxy from unknown addresses in a front-end proxy or firewall log; later logins with valid credentials from unfamiliar addresses (/log print where topics~"account").
Unknown users or scripts after updating: /user print, /system script print, /system scheduler print.

Related vulnerabilities

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC and reviewed by an editor. Always confirm with your vendor's advisory.