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Vulnerabilities

Vulnerability · CVE-2026-84790

OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

Published Oct 13, 2026 · catalog updated Oct 18, 2026 · OpenVPN 2.7_alpha1 through 2.7.7

Check if you run it

No confirmed exploitation is on record for CVE-2026-84790. EPSS is 0.22%. Act only if a listed version of OpenVPN 2.7_alpha1 through 2.7.7 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (OpenVPN 2.7_alpha1 through 2.7.7).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
Debian:12 openvpn · Debian:13 openvpn · Debian:14 openvpn

OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

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.

  • Debian:12 openvpn2.6.11-1, 2.6.12-1, 2.6.13-1
  • Debian:13 openvpn2.6.14-1, 2.6.14-1+deb13u1, 2.6.14-1+deb13u2
  • Debian:14 openvpn0 → 2.7.8-1

How to fix CVE-2026-84790

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-2026-84790. EPSS is 0.22%. Act only if a listed version of OpenVPN 2.7_alpha1 through 2.7.7 is installed.

Which versions are affected?

Compare what you have installed with 2.6.11-1, 2.6.12-1, 2.6.13-1, 2.6.14-1, 2.6.14-1+deb13u1, 2.6.14-1+deb13u2, 0 → 2.7.8-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-158; CWE-290: Authentication Bypass by Spoofing. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

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. Oct 13, 2026 · Catalog

    Detected

    OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

  2. Oct 14, 2026 · Catalog

    Fix available

    Debian:14 openvpn 0 → 2.7.8-1

  3. Oct 14, 2026 · Catalog

    Updated

    OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

  4. Oct 18, 2026 · NIST NVD

    Updated

    OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.