Off-by-one Error Affecting openvpn package, versions [2.1.0,2.6.21)[2.7_alpha1,2.7.5)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-OPENVPN-18507754
- published2 Aug 2026
- disclosed30 Jul 2026
- creditUnknown
Introduced: 30 Jul 2026
NewCVE-2026-11771 (opens in a new tab)How to fix?
Upgrade openvpn to version 2.6.21, 2.7.5 or higher.
Overview
Affected versions of this package are vulnerable to Off-by-one Error in the NTLM proxy authentication process. An attacker can cause a crash by sending a specially crafted NTLM response from a malicious proxy server.