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CVE-2022-0547OpenVPN 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…
- 9.8CriticalCVSS base score
- 3.5%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By OpenVPN
- 38 days later
· 38 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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 (13 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.
Affected products
OpenVPN
- affected version 2.1 until version 2.4.12 and 2.5.6.
References
References7
- 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)
- EUVD EUVD-2022-15669 (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://cveledger.app/cve/CVE-2022-0547)Record last updated .