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Vulnerabilities

Vulnerability · CVE-2025-50054

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

Published Jun 20, 2025 · catalog updated Jun 23, 2025 · OpenVPN

Last checked Oct 27, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-50054. EPSS is 0.25%. Act only if a listed version of OpenVPN is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Version ranges on file
Affected products
vendor OpenVPN ovpn-dco-win 0 <2.5.9

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

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 ovpn-dco-win 0 <2.5.90 <2.5.9

How to fix CVE-2025-50054

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-2025-50054. EPSS is 0.25%. Act only if a listed version of OpenVPN is installed.

Which versions are affected?

Compare what you have installed with OpenVPN ovpn-dco-win 0 <2.5.9 0 <2.5.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.25%. 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. Jun 20, 2025 · EUVD

    Detected

    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

  2. Jun 23, 2025 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-50054

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-50054

    30-day exploitation probability 0.25%

    first.org
  • EUVDVulnerability recordEUVD-2025-18726

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 27, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026