Is CVE-2023-21699 in the CISA KEV catalog?

No. CVE-2023-21699 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-21699?

CVE-2023-21699 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2023-21699?

CVE-2023-21699 has an EPSS score of 1.10% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-21699?

Install KB5022858 for Windows 10. Fixes are available for 16 affected products.

CVE & CISA-KEV Catalog

CVE-2023-21699

MEDIUM

5.3

CVSS v3

NVD

Description

Windows Internet Storage Name Service (iSNS) Server Information Disclosure Vulnerability

CWE-125Out-of-bounds Read

How to fix

Remediation Available

Windows 10Windows

Install:KB5022858Microsoft

Windows 10 Version 1607Windows

Install:KB5022838Microsoft

Windows 10 Version 1809Windows

Install:KB5022840Microsoft

Windows 10 Version 20H2Windows

Install:KB5022834Microsoft

Windows 10 Version 21H2Windows

Install:KB5022834Microsoft

Windows 10 Version 22H2Windows

Install:KB5022834Microsoft

Windows Server 2008Windows

Install:KB5022890Microsoft

Install:KB5022893Microsoft

Windows Server 2008 R2Windows

Install:KB5022874Microsoft

Install:KB5022872Microsoft

Windows Server 2012Windows

Install:KB5022895Microsoft

Install:KB5022903Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5022903Microsoft

Install:KB5022895Microsoft

Windows Server 2012 R2Windows

Install:KB5022894Microsoft

Install:KB5022899Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5022899Microsoft

Install:KB5022894Microsoft

Windows Server 2016Windows

Install:KB5022838Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5022838Microsoft

Windows Server 2019Windows

Install:KB5022840Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5022840Microsoft

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

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.10%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

Embed a live status badge for CVE-2023-21699

Markdown

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HTML

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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 2024-11-21.