CVE-2026-50696: Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

highCVSS 7.5CVE-2026-50696

Heap-based buffer overflow in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.

CSIRTS triage

vendor: Microsoft product: Windows Internet Key Exchange (IKE) Protocol Denial of service

What: A heap-based buffer overflow in Windows IKE Protocol allows an unauthorized attacker to deny service over a network.
Who is affected: Unauthorized attackers targeting Windows IKE Protocol are affected.
Urgency: Remediation is urgent due to the high severity and potential for denial of service.
Action: Apply the latest security patch for Windows IKE Protocol.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50696

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-506960.82% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50696	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Internet Key Exchange

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-50696: Heap-based buffer overflow in Windows Internet Key Exchange (IKE) Protocol allows an unauthori…nvd · 2026-07-14
criticalexploitedCVE-2018-0159: Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
criticalexploitedCVE-2017-12237: Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerabilitycisa-kev · 2022-03-03
criticalexploitedCVE-2018-0158: Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerabilitycisa-kev · 2022-03-03