CVE tracker / CVE-2026-119909

CVE-2026-119909

CVE-2026-119909 is the Windows Internet Information Services Denial of Service Vulnerability. Microsoft rates it Important, CVSS 5.9. It is not in CISA's Known Exploited Vulnerabilities catalog. Published November 10, 2026.

Risk summary

MediumDenial of Service
5.9
CVSS v3 base
Medium
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV

Microsoft describes it: “Uncontrolled resource consumption in Windows Internet Information Services allows an unauthorized attacker to deny service over a network.”

How to fix it

Microsoft lists 28 affected products and the update that fixes each:

What Microsoft changed

Details

Weakness
CWE-401: Missing Release of Memory after Effective Lifetime
Publicly disclosed (Microsoft)
No
Exploited (Microsoft)
No
Known exploited (CISA KEV)
Not listed
Published
November 10, 2026
Last revised
November 10, 2026

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.