CVE-2026-89035 MikroTik RouterOS - Authentication Bypass

MikroTik RouterOS through 7.24.5 contains an authentication bypass caused by session token replay in the WebFig interface due to fixed salts in token generation and lack of channel context verification, letting attackers gain persistent administrative access by replaying captured tokens.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-613

Vendor fix

Update to the latest version beyond 7.24.5.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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