CVE-2023-21715

CRITICALNVD 7.39.0▲
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 7.3 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: 12%CVSS: 7.3Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

Microsoft Publisher Security Feature Bypass Vulnerability

CVSS v3
7.3
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
12%
EPSS %ILE
96%
KEV
⚠ Exploited

Published

February 14, 2023

Last Modified

August 19, 2026

Advisory Details (2)

Auto-updated Jun 9, 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-2023-21715
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-2023-21715

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 96× in last 7d / 394× 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 1,289 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2023-21715?
CVE-2023-21715 is a critical vulnerability published on February 14, 2023. Microsoft Publisher Security Feature Bypass Vulnerability
When was CVE-2023-21715 disclosed?
CVE-2023-21715 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-2023-21715 actively exploited?
Yes. CISA added CVE-2023-21715 to the Known Exploited Vulnerabilities catalog on February 14, 2023, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-21715?
CVE-2023-21715 has a CVSS v3 base score of 7.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-21715?
CVE-2023-21715 affects Microsoft Office. 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-2023-21715?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-21715, 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

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