Is CVE-2026-55142 in the CISA KEV catalog?

No. CVE-2026-55142 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-55142?

CVE-2026-55142 has a CVSS v3 base score of 5.5 (Important).

What is the EPSS score for CVE-2026-55142?

CVE-2026-55142 has an EPSS score of 0.38% (31th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-55142?

Install KB5002891 for Microsoft SharePoint Enterprise Server 2016. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2026-55142

HIGH

5.5

CVSS v3

NVD

Description

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

CWE-197

How to fix

Remediation Available

Microsoft SharePoint Enterprise Server 2016Microsoft

Install:KB5002891Microsoft

Install:KB5002892Microsoft

Microsoft SharePoint Server 2019Microsoft

Install:KB5002885Microsoft

Install:KB5002883Microsoft

Microsoft SharePoint Server Subscription EditionMicrosoft

Install:KB5002882Microsoft

Microsoft Word 2016Microsoft

Install:KB5002890Microsoft

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 VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.38%probability of exploitation in 30 days

31stpercentile

Low risk: more likely to be exploited than 31% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-197 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-42475	Critical	9.8	99%	KEV + Ransom	Fix
CVE-2025-6965	High	7.7	73%	-	Fix
CVE-2024-21310	High	7.8	12%	-	Fix
CVE-2024-43639	Critical	9.8	8.7%	-	Fix
CVE-2024-38125	High	7.8	5.9%	-	Fix
CVE-2024-28944	High	8.8	2.4%	-	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 2026-07-16.