CVE-2023-21823

CVE-2023-21823 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-02-14). The underlying weakness is classified as CWE-190.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• EPSS exploit prediction: 6% (92nd percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2023-02-14)
• EU (EUVD) id: EUVD-2023-25989
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-02-14)
• Weakness: CWE-190
• Affected product: Microsoft Windows 10 1507
• Published: 2023-02-14
• Last modified: 2026-06-17

Description

Windows Graphics Component Remote Code Execution Vulnerability

Frequently asked questions

What is CVE-2023-21823?

Windows Graphics Component Remote Code Execution Vulnerability

How severe is CVE-2023-21823?

CVE-2023-21823 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-2023-21823 being actively exploited?

Yes. CVE-2023-21823 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-02-14, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-21823?

CVE-2023-21823 primarily affects Microsoft Windows 10 1507. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21823?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-21823 have an EU (EUVD) identifier?

Yes. CVE-2023-21823 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-25989. It is also flagged as exploited in the EUVD (since 2023-02-14).

When was CVE-2023-21823 published?

CVE-2023-21823 was published on 2023-02-14 and last updated on 2026-06-17.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21823
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21823

Affected products (28)

• cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*

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Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

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• CVE-2025-64721 — Critical (CVSS 10.0): Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions…
• CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
• CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
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