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CVE-2022-0547
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes…
Critical9.8EPSS 3.5%
- Published
- Updated
- Reserved
- Assigned by
- OpenVPN
Description
OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.5% · top 11% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
OpenVPN
- affected version 2.1 until version 2.4.12 and 2.5.6.
References (7)
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements (opens in a new tab)x_refsource_MISCx_transferred
- https://community.openvpn.net/openvpn/wiki/CVE-2022-0547 (opens in a new tab)x_refsource_MISCx_transferred
- https://openvpn.net/community-downloads/ (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2022-7d46acce7c (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2022-cb4c1146dc (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-0547)Record last updated .