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TI-2025-31967 Aliases CVE-2025-50054GHSA-c5v3-f4mm-7xmw

Heap-based buffer overflow in OpenVPN ovpn-dco-win

Priority LOW 24CWE-122Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Fix Fixed ovpn-dco-win (OpenVPN): 1.3.1, 2.5.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenVPNovpn-dco-winbefore 1.3.1; before 2.5.91.3.1, 2.5.9Patch availableCNA
  • ovpn-dco-win VendorOpenVPN Affected before 1.3.1; before 2.5.9 Fixed in 1.3.1, 2.5.9 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openvpn:ovpn-dco-win:*:*:*:*:*:*:*:*up to 1.3.0; 2.4.0 – 2.5.8VulnerableOpenVPN
  • cpe:2.3:a:openvpn:ovpn-dco-win:*:*:*:*:*:*:*:* Versions up to 1.3.0; 2.4.0 – 2.5.8 Vulnerable ·OpenVPN

Remediation

  • Fix · CNA ovpn-dco-win (OpenVPN) Fixed in 1.3.1, 2.5.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-50054
  2. 2026-10-03 Alias added: GHSA-c5v3-f4mm-7xmw

References

Advisory 1

Other 1

  • TI-2026-10019 Heap-based buffer overflow in OpenVPN ovpn-dco-win CVSS 4.0MEDIUM 5.6
  • TI-2024-04824 NULL pointer dereference in OpenVPN ovpn-dco CVSS 3.1LOW 3.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences