How severe is CVE-2026-44195?

CVE-2026-44195 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-44195 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44195?

CVE-2026-44195 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44195?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44195 have an EU (EUVD) identifier?

Yes. CVE-2026-44195 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30185.

When was CVE-2026-44195 published?

CVE-2026-44195 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44195

CVE-2026-44195 is a medium-severity vulnerability in Opnsense with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30185
Weakness: CWE-307
Affected product: Opnsense
Published: 2026-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-44195?: 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.
How severe is CVE-2026-44195?: CVE-2026-44195 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-44195 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44195?: CVE-2026-44195 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44195?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44195 have an EU (EUVD) identifier?: Yes. CVE-2026-44195 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30185.
When was CVE-2026-44195 published?: CVE-2026-44195 was published on 2026-05-13 and last updated on 2026-06-17.

References

Affected products (1)

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

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