Is CVE-2023-21566 in the CISA KEV catalog?

No. CVE-2023-21566 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-21566?

CVE-2023-21566 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2023-21566?

CVE-2023-21566 has an EPSS score of 0.37% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-21566?

Upgrade visual studio 2017 to 15.9.52 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2023-21566

HIGH

7.8

CVSS v3

NVD

Description

Visual Studio Elevation of Privilege Vulnerability

CWE-73External Control of File Name or Path

How to fix

Remediation Available

visual studio 2017NVD

Affected:>= 15.0, < 15.9.52Fixed in:15.9.52CVE-2023-21566derived from NVD

visual studio 2019NVD

Affected:>= 16.0, < 16.11.24Fixed in:16.11.24CVE-2023-21566derived from NVD

visual studio 2022NVD

Affected:>= 17.4, < 17.4.5Fixed in:17.4.5CVE-2023-21566derived from NVD

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-73 (External Control of File Name or Path) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2024-8517	Critical	9.8	95%	-	Fix
CVE-2023-4634	Critical	9.8	83%	-	Fix
CVE-2018-17246	Critical	9.8	82%	-	Fix
CVE-2024-43451	Medium	6.5	82%	KEV	Fix
CVE-2025-33053	High	8.8	82%	KEV	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 2024-11-21.