CVE-2025-50054: openvpn ovpn-dco-win Heap-based Buffer Overflow
CVSS: 5.5v3.1MediumAnalyzed
Published 20-06-2025Last modified 23-06-2025
Vulnerability summary
CVE-2025-50054 is a medium (CVSS 5.5) Heap-based Buffer Overflow vulnerability in openvpn ovpn-dco-win. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.1% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.24%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 20-06-2025PublishedVulnerability first disclosed.
- 23-06-2025Last modifiedVulnerability information updated.
Description
Buffer overflow in OpenVPN ovpn-dco-win version 1.3.0 and earlier and version 2.5.8 and earlier allows a local user process to send a too large control message buffer to the kernel driver resulting in a system crash
CVSS metrics
2 scores · 2 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
14%
Versus all other CVEs
30-day change
+0.01 pp
From 0.23% on 20-09-2026
20-09-202620-10-2026
EPSS score0.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Openvpn1 product
- ovpn-dco-win< 1.3.1 | < 2.5.9 | ≤ 1.3.0 | ≥ 2.4.0, ≤ 2.5.8
1 vendor · 1 product
References
2 links- community.openvpn.net/DownloadsRelease Notes