CVE-2026-77696: Timing Side-Channel in SM2 Signature Generation

Overview

Severity

Low (CVSS 3.7)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-03

EPSS Score

0.24% (percentile: 14.1%)

Affected Products (5)

Other

• 21767-17084
• 21915-17084
• 21780-17084
• 21840-17084
• 21918-17084

Revision History

• 2026-10-03: Information published.