Is CVE-2026-50502 in the CISA KEV catalog?

No. CVE-2026-50502 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-50502?

CVE-2026-50502 has a CVSS v3 base score of 8.0 (Important).

What is the EPSS score for CVE-2026-50502?

CVE-2026-50502 has an EPSS score of 0.61% (45th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-50502?

Install KB5099535 for Windows 10 Version 1607. Fixes are available for 19 affected products.

CVE & CISA-KEV Catalog

CVE-2026-50502

HIGH

8.0

CVSS v3

NVD

Description

Insufficient granularity of access control in Windows Event Logging Service allows an authorized attacker to execute code over a network.

CWE-1220

How to fix

Remediation Available

Windows 10 Version 1607Windows

Install:KB5099535Microsoft

Windows 10 Version 1809Windows

Install:KB5099538Microsoft

Windows 10 Version 21H2Windows

Install:KB5099539Microsoft

Windows 10 Version 22H2Windows

Install:KB5099539Microsoft

Windows 11 Version 24H2Windows

Install:KB5101650Microsoft

Windows 11 Version 25H2Windows

Install:KB5101650Microsoft

Windows 11 Version 26H1Windows

Install:KB5101649Microsoft

Windows 11 version 26H1Windows

Install:KB5095051Microsoft

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 RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.61%probability of exploitation in 30 days

45thpercentile

Moderate risk: more likely to be exploited than 45% of all known CVEs.

References

Other references1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-1220 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-31201	Critical	9.8	15%	KEV	Fix
CVE-2026-33825	High	7.8	6.7%	KEV + Ransom	Fix
CVE-2024-42365	High	7.4	4.7%	-	Fix
CVE-2026-39363	High	7.5	2.9%	-	Fix
CVE-2026-49170	High	7.8	2.8%	-	Fix
CVE-2023-43040	Medium	6.5	2.5%	-	Fix

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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 2026-07-16.