HOMEVULNERABILITIESCVE-2026-44195
MEDIUM

CVE-2026-44195

CWE-307Published: May 13, 2026· Updated: May 15, 2026

6.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:13.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-44195 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

opnsense1 product
opnsense
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42

All References (2)

→
https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42Exploit · Mitigation · Vendor Advisory
→
https://gist.github.com/sopex/b9786e72e2a5d9b1bbd81ed8477c351bExploit

Quick Facts

CVE IDCVE-2026-44195
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-307
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 13, 2026

Related CVEs (CWE-307)

CVE-2026-25945
9.8
CVE-2026-43914
9.8
CVE-2026-24445
9.8
CVE-2025-69246
9.8
CVE-2026-26305
9.8
CVE-2026-33640
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-44195 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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