CVE-2026-50721: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload

Overview

Severity

High (CVSS 8.1)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-04

Last Updated

2026-07-09

EPSS Score

0.39% (percentile: 30.7%)

Affected Products (1)

Other

• 17755-17084

Revision History

• 2026-07-04: Information published.
• 2026-07-09: Information published.