HIGH 8.1 Microsoft
CVE-2026-50721
IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload
Microsoft Security Update 2026-Jul: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload
Affected Products
- azl3 libreswan 4.15-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50721
- https://nvd.nist.gov/vuln/detail/CVE-2026-50721
This high severity vulnerability with a CVSS score of 8.1 was published on 2026-07-14 via Microsoft. Affected: azl3 libreswan 4.15-1 on Azure Linux 3.0.
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