CVE-2026-58058: Nmap - Integer Underflow in IPv6 Extension Header Parsing

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-29

EPSS Score

0.28% (percentile: 19.5%)

Affected Products (1)

Other

• 20881-17084

Revision History

• 2026-06-29: Information published.