CVE-2023-21566
CVE-2023-21566 is a high-severity vulnerability in Microsoft Visual Studio 2017 with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-73.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (29th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-73
- Affected product: Microsoft Visual Studio 2017
- Published:
- Last modified:
Description
Visual Studio Elevation of Privilege Vulnerability
Frequently asked questions
- What is CVE-2023-21566?
- Visual Studio Elevation of Privilege Vulnerability
- How severe is CVE-2023-21566?
- CVE-2023-21566 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-21566 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-21566?
- CVE-2023-21566 primarily affects Microsoft Visual Studio 2017. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-21566?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-21566 published?
- CVE-2023-21566 was published on 2023-02-14 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
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