CVE-2025-12106

CRITICALNVD 9.19.1—Trending — 3 sources updated this week

9.1

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

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 24.3%
KEV: Not listed

Published

December 1, 2025

Last Modified

December 30, 2025

References (2)

security@openvpnhttps://community.openvpn.net/Security%20Announcements/CVE-2025-12106
security@openvpnhttps://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-126Buffer Over-read

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 18:42 UTCEG score recompute
2026-05-29 18:42 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-12106?

CVE-2025-12106 is a critical vulnerability published on December 1, 2025. Insufficient argument validation in OpenVPN 2.7alpha1 through 2.7rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

When was CVE-2025-12106 disclosed?

CVE-2025-12106 was first published in the National Vulnerability Database on December 1, 2025, with the most recent update on December 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-12106 actively exploited?

CVE-2025-12106 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-12106?

CVE-2025-12106 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2025-12106?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12106, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-12106

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-12106?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)