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CVE-2026-44195

6.5 medium SSVC exploitation: poc Analyzed
NVD · CVE.org

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, a logic flaw in the OPNsense lockout_handler allows an unauthenticated attacker to continuously reset the authentication failure counter for their IP address. By interjecting a crafted username containing a success keyword ("Accepted" or "Successful login") between normal brute-force attempts, an attacker can prevent the failure counter from ever reaching the lockout threshold. This vulnerability is fixed in 26.1.7.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.5 · opnsenseNVD modified 2026-10-26 14:10

Affected (CPE criteria) 1

  • cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*

References 2