CVE-2023-21823

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-02-14), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 6%CVSS: 7.8Exploit: cisa kev · ssvc active · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Windows Graphics Component Remote Code Execution Vulnerability

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
6%
EPSS %ILE
92%
KEV
⚠ Exploited

Published

February 14, 2023

Last Modified

August 19, 2026

Advisory Details (2)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21823
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21823

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 97× in last 7d / 406× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 1,352 total refreshes for this CVE.

  1. 2026-09-08 21:57 UTCEPSS rescore
  2. 2026-09-08 21:04 UTCGHSA enrichment
  3. 2026-09-08 18:54 UTCCISA KEV update
  4. 2026-09-08 17:00 UTCVendor advisory
  5. 2026-09-08 17:00 UTCGHSA enrichment
  6. 2026-09-08 12:57 UTCVendor advisory
  7. 2026-09-08 12:57 UTCGHSA enrichment
  8. 2026-09-08 08:52 UTCGHSA enrichment
  9. 2026-09-08 04:47 UTCVendor advisory
  10. 2026-09-08 04:47 UTCGHSA enrichment
  11. 2026-09-08 00:43 UTCVendor advisory
  12. 2026-09-08 00:43 UTCGHSA enrichment
  13. 2026-09-07 20:40 UTCVendor advisory
  14. 2026-09-07 20:39 UTCGHSA enrichment
  15. 2026-09-07 16:36 UTCEG score recompute
  16. 2026-09-07 16:36 UTCVendor advisory
  17. 2026-09-07 16:36 UTCGHSA enrichment
  18. 2026-09-07 15:59 UTCEPSS rescore
  19. 2026-09-07 12:33 UTCVendor advisory
  20. 2026-09-07 12:32 UTCGHSA enrichment
  21. 2026-09-07 08:27 UTCVendor advisory
  22. 2026-09-07 08:27 UTCGHSA enrichment
  23. 2026-09-07 04:23 UTCVendor advisory
  24. 2026-09-07 04:23 UTCGHSA enrichment
  25. 2026-09-07 00:19 UTCVendor advisory
Show 75 more
  1. 2026-09-07 00:19 UTCGHSA enrichment
  2. 2026-09-06 20:14 UTCVendor advisory
  3. 2026-09-06 20:14 UTCGHSA enrichment
  4. 2026-09-06 16:11 UTCEG score recompute
  5. 2026-09-06 16:11 UTCVendor advisory
  6. 2026-09-06 16:11 UTCGHSA enrichment
  7. 2026-09-06 13:45 UTCEPSS rescore
  8. 2026-09-06 12:06 UTCVendor advisory
  9. 2026-09-06 12:05 UTCGHSA enrichment
  10. 2026-09-06 08:01 UTCVendor advisory
  11. 2026-09-06 08:01 UTCGHSA enrichment
  12. 2026-09-06 03:58 UTCVendor advisory
  13. 2026-09-06 03:58 UTCGHSA enrichment
  14. 2026-09-05 23:55 UTCVendor advisory
  15. 2026-09-05 23:55 UTCGHSA enrichment
  16. 2026-09-05 19:52 UTCVendor advisory
  17. 2026-09-05 19:52 UTCGHSA enrichment
  18. 2026-09-05 15:49 UTCEG score recompute
  19. 2026-09-05 15:49 UTCVendor advisory
  20. 2026-09-05 15:49 UTCGHSA enrichment
  21. 2026-09-05 15:25 UTCEPSS rescore
  22. 2026-09-05 11:44 UTCVendor advisory
  23. 2026-09-05 11:44 UTCGHSA enrichment
  24. 2026-09-05 07:40 UTCVendor advisory
  25. 2026-09-05 07:40 UTCGHSA enrichment
  26. 2026-09-05 03:37 UTCVendor advisory
  27. 2026-09-05 03:37 UTCGHSA enrichment
  28. 2026-09-04 23:33 UTCVendor advisory
  29. 2026-09-04 23:33 UTCGHSA enrichment
  30. 2026-09-04 19:30 UTCVendor advisory
  31. 2026-09-04 19:30 UTCGHSA enrichment
  32. 2026-09-04 17:38 UTCCISA KEV update
  33. 2026-09-04 15:27 UTCEG score recompute
  34. 2026-09-04 15:27 UTCVendor advisory
  35. 2026-09-04 15:27 UTCGHSA enrichment
  36. 2026-09-04 13:58 UTCEPSS rescore
  37. 2026-09-04 13:57 UTCEPSS rescore
  38. 2026-09-04 11:24 UTCVendor advisory
  39. 2026-09-04 11:24 UTCGHSA enrichment
  40. 2026-09-04 07:20 UTCEG score recompute
  41. 2026-09-04 07:20 UTCVendor advisory
  42. 2026-09-04 07:20 UTCGHSA enrichment
  43. 2026-09-04 05:04 UTCEPSS rescore
  44. 2026-09-04 03:17 UTCVendor advisory
  45. 2026-09-04 03:16 UTCGHSA enrichment
  46. 2026-09-03 23:11 UTCVendor advisory
  47. 2026-09-03 23:10 UTCGHSA enrichment
  48. 2026-09-03 19:05 UTCVendor advisory
  49. 2026-09-03 19:04 UTCGHSA enrichment
  50. 2026-09-03 14:59 UTCVendor advisory
  51. 2026-09-03 14:59 UTCGHSA enrichment
  52. 2026-09-03 10:54 UTCVendor advisory
  53. 2026-09-03 10:54 UTCGHSA enrichment
  54. 2026-09-03 06:50 UTCVendor advisory
  55. 2026-09-03 06:50 UTCGHSA enrichment
  56. 2026-09-03 02:45 UTCVendor advisory
  57. 2026-09-03 02:45 UTCGHSA enrichment
  58. 2026-09-02 22:42 UTCVendor advisory
  59. 2026-09-02 22:42 UTCGHSA enrichment
  60. 2026-09-02 18:39 UTCVendor advisory
  61. 2026-09-02 18:39 UTCGHSA enrichment
  62. 2026-09-02 17:33 UTCCISA KEV update
  63. 2026-09-02 14:35 UTCEG score recompute
  64. 2026-09-02 14:35 UTCVendor advisory
  65. 2026-09-02 14:35 UTCGHSA enrichment
  66. 2026-09-02 14:09 UTCEPSS rescore
  67. 2026-09-02 10:32 UTCVendor advisory
  68. 2026-09-02 10:32 UTCGHSA enrichment
  69. 2026-09-02 06:27 UTCVendor advisory
  70. 2026-09-02 06:27 UTCGHSA enrichment
  71. 2026-09-02 02:24 UTCVendor advisory
  72. 2026-09-02 02:23 UTCGHSA enrichment
  73. 2026-09-01 22:20 UTCVendor advisory
  74. 2026-09-01 22:20 UTCGHSA enrichment
  75. 2026-09-01 18:17 UTCVendor advisory

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCElizarfish/CVE-2023-21823
    First seen Apr 20, 2023

    CVE-2023-21823 PoC

    Open source ↗

Frequently asked(6)

What is CVE-2023-21823?
CVE-2023-21823 is a critical vulnerability published on February 14, 2023. Windows Graphics Component Remote Code Execution Vulnerability
When was CVE-2023-21823 disclosed?
CVE-2023-21823 was first published in the National Vulnerability Database on February 14, 2023, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-21823 actively exploited?
Yes. CISA added CVE-2023-21823 to the Known Exploited Vulnerabilities catalog on February 14, 2023, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-21823?
CVE-2023-21823 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-21823?
CVE-2023-21823 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-21823?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-21823, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-21823

Explore →

Is Your Infrastructure Affected by CVE-2023-21823?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs