Is CVE-2025-26671 in the CISA KEV catalog?

No. CVE-2025-26671 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-26671?

CVE-2025-26671 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2025-26671?

CVE-2025-26671 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26671?

Install KB5055570 for Windows Server 2008 R2. Fixes are available for 14 affected products.

CVE & CISA-KEV Catalog

CVE-2025-26671

HIGH

8.1

CVSS v3

NVD

Description

Use after free in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network.

CWE-416Use After Free CWE-591

How to fix

Remediation Available

Windows Server 2008 R2Windows

Install:KB5055570Microsoft

Install:KB5055561Microsoft

Windows Server 2012Windows

Install:KB5055581Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5055581Microsoft

Windows Server 2012 R2Windows

Install:KB5055557Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5055557Microsoft

Windows Server 2016Windows

Install:KB5055521Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5055521Microsoft

Windows Server 2019Windows

Install:KB5055519Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5055519Microsoft

Windows Server 2022Windows

Install:KB5055526Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5055526Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5055527Microsoft

Windows Server 2025Windows

Install:KB5055523Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5055523Microsoft

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

Embed a live status badge for CVE-2025-26671

Markdown

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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 2025-07-09.