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Vulnerabilities

Vulnerability · CVE-2025-12106

Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

Published Dec 1, 2025 · catalog updated Dec 1, 2025 · OpenVPN OpenVPN

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-12106. EPSS is 0.58%. Act only if a listed version of OpenVPN OpenVPN is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.58%
Remediation
Advisory link
Affected products
vendor OpenVPN OpenVPN 2.7_alpha1 ≤2.7_rc1

Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor OpenVPN OpenVPN 2.7_alpha1 ≤2.7_rc12.7_alpha1 ≤2.7_rc1

How to fix CVE-2025-12106

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-12106. EPSS is 0.58%. Act only if a listed version of OpenVPN OpenVPN is installed.

Which versions are affected?

Compare what you have installed with OpenVPN OpenVPN 2.7_alpha1 ≤2.7_rc1 2.7_alpha1 ≤2.7_rc1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.58%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 1, 2025 · EUVD

    Detected

    Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

  2. Dec 1, 2025 · EUVD

    Updated

    Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

Sources

  • CVE.orgVulnerability recordCVE-2025-12106

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12106

    30-day exploitation probability 0.58%

    first.org
  • EUVDVulnerability recordEUVD-2025-199988

    Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 27, 2026