MikroTik RouterOS through 7.24.5 contains a session token replay vulnerability in the WebFig interface that allows attackers to bypass authentication by replaying captured session tokens across new ECDH sessions. The makeSessionKey function in libucrypto.so generates tokens using fixed salts without incorporating channel-specific or session-specific input, and the user service validates tokens against the login store without verifying channel context, enabling stolen tokens to grant persistent administrative access until the token store is explicitly cleared. This vulnerability extends the impact of CVE-2025-61481, which identified the underlying transport-layer exposure without a corresponding fix.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Public exploits 1
- emirwtz/CVE-2026-89035 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Change history 8
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-28 01:25
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-28 02:17
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 10:14
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 17:39
- StatusReceived → PublishedNVD modified 2026-10-21 17:16
- StatusPublished → ReceivedNVD modified 2026-10-21 18:17
- CVSS9.1 (v4.0, CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N) → 9.1 (v4.0, CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-21 18:17
- First seenCVSS 9.1 · mikrotikNVD modified 2026-10-21 17:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.