What is CVE-2026-45635?

CVE-2026-45635 is a high-severity vulnerability, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2026-06-09.

How severe is CVE-2026-45635?

High severity. CVSS v3 base score is 8.1 out of 10.

CVE-2026-45635

CVE-2026-45635

Use after free in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45635?: CVE-2026-45635 is a high-severity vulnerability, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2026-06-09.
How severe is CVE-2026-45635?: High severity. CVSS v3 base score is 8.1 out of 10.