CVE-2023-41763

CRITICALPre-NVD 5.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-10-10), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 5.3 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
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: 90%CVSS: 5.3Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

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

Skype for Business Elevation of Privilege Vulnerability

CVSS v3
5.3
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: 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%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
90%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

October 10, 2023

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jun 13, 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-2023-41763
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-2023-41763

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 98× in last 7d / 402× 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 1,322 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • Nucleihttp/cves/2023/CVE-2023-41763.yaml
    First seen Jan 1, 2023

    Skype for Business 2019 (SfB) - Blind Server-side Request Forgery

    Open source ↗

Frequently asked(6)

What is CVE-2023-41763?
CVE-2023-41763 is a critical vulnerability published on October 10, 2023. Skype for Business Elevation of Privilege Vulnerability
When was CVE-2023-41763 disclosed?
CVE-2023-41763 was first published in the National Vulnerability Database on October 10, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-41763 actively exploited?
Yes. CISA added CVE-2023-41763 to the Known Exploited Vulnerabilities catalog on October 10, 2023, affecting Microsoft Skype for Business. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-41763?
CVE-2023-41763 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-41763?
CVE-2023-41763 affects Microsoft Skype for Business. 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-2023-41763?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-41763, 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-2023-41763

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