CVE tracker / CVE-2026-35424

CVE-2026-35424

CVE-2026-35424 is the Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability. Microsoft rates it Important, CVSS 7.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published May 12, 2026.

Risk summary

HighDenial of Service
7.5
CVSS v3 base
1.2%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Unlikely
Microsoft: exploitation
No
In CISA KEV

Microsoft describes it: “Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.”

How to fix it

Microsoft lists 31 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
May 12, 2026
Last revised
May 12, 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.