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CVE-2026-58704

High CVSS 8.8 Known exploited

Published 2026-09-15 · last changed 2026-09-17 · added to CISA KEV 2026-09-16

This one is being exploited in the wild.

CISA added CVE-2026-58704 to the Known Exploited Vulnerabilities catalog on 2026-09-16. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2026-58704, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

In Cellular Modem, there is a possible permission bypass due to a logic error in the code. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Sources

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