9.1

CVE-2025-12106: openvpn Buffer Over-read

CVSS: 9.1v3.1CriticalAnalyzed
Published 01-12-2025Last modified 01-12-2025
Open JSON

Vulnerability summary

CVE-2025-12106 is a critical (CVSS 9.1) Buffer Over-read vulnerability in openvpn. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.56%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-12-2025
    PublishedVulnerability first disclosed.
  2. 01-12-2025
    Last modifiedVulnerability information updated.

Description

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.56%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

0.00 pp

From 0.56% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.56%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Openvpn1 product
  • openvpn≥ 2.7_alpha1, ≤ 2.7_rc1 | 2.6.13 | 2.7:alpha1 | 2.7:alpha2 | 2.7:alpha3 | 2.7:beta1 | 2.7:beta2 | 2.7:beta3 | 2.7:rc1

1 vendor · 1 product

References

2 links