Is CVE-2025-25006 in the CISA KEV catalog?

No. CVE-2025-25006 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-25006?

CVE-2025-25006 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2025-25006?

CVE-2025-25006 has an EPSS score of 0.84% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-25006?

Install KB5063223 for Microsoft Exchange Server 2016 Cumulative Update 23. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2025-25006

MEDIUM

5.3

CVSS v3

NVD

Description

Improper handling of additional special element in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

CWE-167

How to fix

Remediation Available

Microsoft Exchange Server 2016 Cumulative Update 23Microsoft

Install:KB5063223Microsoft

Microsoft Exchange Server 2019 Cumulative Update 14Microsoft

Install:KB5063222Microsoft

Microsoft Exchange Server 2019 Cumulative Update 15Microsoft

Install:KB5063221Microsoft

Microsoft Exchange Server Subscription Edition RTMMicrosoft

Install:KB5063224Microsoft

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

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.84%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-167 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4809	High	7.5	0.7%	-	Fix
CVE-2023-3580	Medium	4.3	0.6%	-	Fix
CVE-2023-0643	Medium	6.1	0.6%	-	Fix
CVE-2025-30656	High	7.5	0.4%	-	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 2026-06-15.