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CVE-2026-89035

Last refreshed2026-10-23

Status: UPDATED  |  Advisory ID: CVE-2026-89035

Key Details

CVECVE-2026-89035
CVSS Score / Version
7.4 (High) / CVSS v3.1
Updated2026-10-22
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Prose
attack vector is network; attack complexity is high; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is none.
Affected products
MikroTik RouterOS
Classified as
CWE-613 (Insufficient Session Expiration)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MikroTikRouterOS
SubsystemsIndustrial Networking & Connectivity
SectorsMulti-sector

What to Know

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. (NVD)

What to Do

Monitor MikroTik's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-89035
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-89035
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