Is CVE-2026-50518 in the CISA KEV catalog?

No. CVE-2026-50518 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-50518?

CVE-2026-50518 has a CVSS v3 base score of 9.8 (Critical).

What is the EPSS score for CVE-2026-50518?

CVE-2026-50518 has an EPSS score of 7.36% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50518?

Install KB5099535 for Windows 10 Version 1607. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2026-50518

CRITICALEPSS 94th pctl

9.8

CVSS v3

NVD

Description

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

CWE-122Heap-based Buffer Overflow

How to fix

Remediation Available

Windows 10 Version 1607Windows

Install:KB5099535Microsoft

Windows 10 Version 1809Windows

Install:KB5099538Microsoft

Windows Server 2012Windows

Install:KB5099445Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5099445Microsoft

Windows Server 2012 R2Windows

Install:KB5099444Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5099444Microsoft

Windows Server 2016Windows

Install:KB5099535Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5099535Microsoft

Windows Server 2019Windows

Install:KB5099538Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5099538Microsoft

Windows Server 2022Windows

Install:KB5099540Microsoft

Windows Server 2025Windows

Install:KB5099536Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5099536Microsoft

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Exploit Intelligence

7.36%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Other references1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2024-26256	High	7.8	88%	-	Fix
CVE-2020-25687	Medium	5.9	87%	-	Fix
CVE-2009-3459	High	8.8	87%	KEV	Fix
CVE-2021-21017	High	8.8	86%	KEV	-
CVE-2020-25683	Medium	5.9	86%	-	Fix

Embed a live status badge for CVE-2026-50518

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.