No exploitation reportedFix available

CVE-2026-35424

Q: Is CVE-2026-35424 actively exploited?

Active exploitation of CVE-2026-35424 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-35424?

CVE-2026-35424 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2026-05-12
WeaknessCWE-401

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2026-05-1218:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-35424?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-35424?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows server 2012

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD
—	= r2	no fix published	NVD

Microsoft windows 10 1607

Branch	Affected	Fixed in	Source
10.0	< 10.0.14393.9140	10.0.14393.9140	NVD

Microsoft windows 10 1809

Branch	Affected	Fixed in	Source
10.0	< 10.0.17763.8755	10.0.17763.8755	NVD

11 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

msrc.microsoft.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-05-13
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-401read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-22
Microsoft MSRCadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-05-12
Last Modified: 2026-06-17
NVD status: Analyzed
MSRC Title: Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

Frequently asked questions

What is CVE-2026-35424?

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

Is CVE-2026-35424 actively exploited?

Active exploitation of CVE-2026-35424 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-35424?

CVE-2026-35424 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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