CVE-2026-89035
MikroTik RouterOS 7.24.5 WebFig Session Token Replay Authentication Bypass
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.
| CWE | CWE-613 |
| Vendor | mikrotik |
| Product | routeros |
| Published | Oct 21, 2026 |
Get instant alerts for mikrotik routeros
Be the first to know when new high vulnerabilities affecting mikrotik routeros are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N