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CVE-2017-7521
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks…
Medium5.9EPSS 3.9%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.9% · top 9.8% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
OpenVPN Technologies, Inc · OpenVPN
- affected before 2.4.3
- affected before 2.3.17
References (4)
- https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1038768 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 99230 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-3900 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
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-2017-7521)Record last updated .