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TI-2020-11855 Aliases CVE-2020-15077GHSA-2fc6-fh8m-r4wf

Authentication bypass in OpenVPN Access Server

Priority LOW 26CWE-305Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

OpenVPN Access Server 2.8.7 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.

Why it matters now

EPSS 0.01215 68th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—OpenVPN Access Server2.8.7 and earlier versions—No fix listedCNA
  • OpenVPN Access Server Vendor— Affected 2.8.7 and earlier versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*up to 2.8.7VulnerableOpenVPN
  • cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:* Versions up to 2.8.7 Vulnerable ·OpenVPN

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15077
  2. 2026-10-03 Alias added: GHSA-2fc6-fh8m-r4wf

References

Advisory 2

  • TI-2023-25309 Use after free in OpenVPN 2 CVSS 3.1CRITICAL 9.8
  • TI-2020-07187 OpenVPN Access Server 2.8.x before 2.8.1 allows LDAP authentication bypass (except when a… CVSS 3.1CRITICAL 9.8
  • TI-2006-01578 OpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on… CVSS 2.0HIGH 9.0
  • TI-2023-25308 Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to… CVSS 3.1HIGH 7.5
  • TI-2005-03217 Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x… CVSS 2.0HIGH 7.5
  • TI-2025-02715 OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP… CVSS 4.0MEDIUM 6.9
See all 20 →

Sources

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