6.5

CVE-2026-44195

Exploit

OPNsense: Authentication lockout bypass

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Opnsense ≫ Opnsense Version < 26.1.7
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.32% 0.233
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.5 3.9 2.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
security-advisories@github.com 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-307 Improper Restriction of Excessive Authentication Attempts

The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.

https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42
Vendor Advisory
Exploit
Mitigation
https://gist.github.com/sopex/b9786e72e2a5d9b1bbd81ed8477c351b
Exploit