CVE•Published 2026-05-13•Modified 2026-05-15•0 articles on news•5 live references•NVD data

CVE-2026-44195Opnsense · Opnsense

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

—

Weaknesses (CWE)

CWE-307Improper Restriction of Excessive Authentication Attempts

Description

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.

Timeline

Published 2026-05-13

Modified 2026-05-15

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-44195

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Opnsense Opnsense"

All exposed Opnsense Opnsense instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Opnsense"

HTTP body or banner mentions "Opnsense" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-44195