CVE-2026-63072: Heap Buffer Overflow in CMS Key Unwrapping

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-27

EPSS Score

0.61% (percentile: 46.9%)

Detection & Weaponization (1 sources)

Maturity: Exploit

• GitHub PoC: 1 repositories

Affected Products (7)

Other

• 21734-17084
• 21748-17084
• 21655-17084
• 21761-17084
• 21643-17084
• 21500-17084
• 21716-17084

Revision History

• 2026-08-27: Information published.