CVE-2024-21346
CVE-2024-21346 is a high-severity vulnerability in Microsoft Windows 11 21h2 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-822.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-19058
- Weakness: CWE-822
- Affected product: Microsoft Windows 11 21h2
- Published:
- Last modified:
Description
Win32k Elevation of Privilege Vulnerability
Frequently asked questions
- What is CVE-2024-21346?
- Win32k Elevation of Privilege Vulnerability
- How severe is CVE-2024-21346?
- CVE-2024-21346 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-2024-21346 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-21346?
- CVE-2024-21346 primarily affects Microsoft Windows 11 21h2. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2024-21346?
- 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.
- Does CVE-2024-21346 have an EU (EUVD) identifier?
- Yes. CVE-2024-21346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19058.
- When was CVE-2024-21346 published?
- CVE-2024-21346 was published on 2024-02-13 and last updated on 2026-06-17.
References
Affected products (4)
- cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Windows 11 21h2
- CVE-2024-38199 — Critical (CVSS 9.8): Windows Line Printer Daemon (LPD) Service Remote Code Execution Vulnerability
- CVE-2024-38140 — Critical (CVSS 9.8): Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
- CVE-2024-38063 — Critical (CVSS 9.8): Windows TCP/IP Remote Code Execution Vulnerability
- CVE-2024-30080 — Critical (CVSS 9.8): Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability
- CVE-2023-36397 — Critical (CVSS 9.8): Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability
- CVE-2023-36028 — Critical (CVSS 9.8): Microsoft Protected Extensible Authentication Protocol (PEAP) Remote Code Execution Vulnerability
All CVEs affecting Microsoft Windows 11 21h2 →
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