CVE-2026-11771
- Source
- https://cve.org/CVERecord?id=CVE-2026-11771
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11771.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-11771
- Downstream
ALPINE (1)
DEBIAN (1)
MGASA (1)
openSUSE (1)
UBUNTU (1)
- Related
- Published
- 2026-07-30T16:36:41Z
- Modified
- 2026-10-28T02:31:08Z
- Severity
-
- 7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H CVSS Calculator
- Summary
- [none]
- Details
-
OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
- Database specific
{ "cna_assigner": "OpenVPN", "cwe_ids": [ "CWE-121", "CWE-193", "CWE-787" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11771.json", "unresolved_ranges": [ { "extracted_events": [ { "range": [ { "introduced": "2.1.0" }, { "last_affected": "2.6.20" }, { "introduced": "2.7_alpha1" }, { "last_affected": "2.7.4" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" } ] } ] }- References
-
- https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026
- https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026
- https://community.openvpn.net/Security%20Announcements/CVE-2026-11771
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11771.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-11771
Affected packages
Git / github.com/openvpn/openvpn
Affected ranges
- Type
- GIT
- Repo
- https://github.com/openvpn/openvpn
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*", "range": [ { "introduced": "2.1.0" }, { "fixed": "2.6.21" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*", "range": [ { "introduced": "2.7" }, { "fixed": "2.7.5" } ], "source": "CPE_RANGE" } ] }
Affected versions
v2.*
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.2-RC
v2.2-RC2
v2.2-beta4
v2.2-beta5
v2.3-alpha1
v2.3_alpha2
v2.3_alpha3
v2.3_beta1
v2.4_alpha1
v2.4_alpha2
v2.4_beta1
v2.4_beta2
v2.4_rc1
v2.4_rc2
v2.6.0
v2.6.1
v2.6.10
v2.6.11
v2.6.12
v2.6.13
v2.6.14
v2.6.15
v2.6.16
v2.6.17
v2.6.18
v2.6.19
v2.6.2
v2.6.20
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.6.7
v2.6.8
v2.6.9
v2.6_beta1
v2.6_beta2
v2.6_rc1
v2.6_rc2
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4