CASCACascade Atlas

Evidence dossier

CVE-2023-41763

Skype for Business Elevation of Privilege Vulnerability

72.3–87.3Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Skype for Business Elevation of Privilege Vulnerability

State
PUBLISHED
Published
Oct 10, 2023
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

FIRST EPSS90.35%

2026-07-18 · v2026.06.15 · percentile 99.8%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

microsoftoriginal assertion
container

Skype for Business Elevation of Privilege Vulnerability

CISA KEVoriginal assertion
observed_exploitation

Microsoft Skype for Business Privilege Escalation Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.903530000000; percentile 0.997870000000

Applicability

Cited product scope

Trace impact →
MicrosoftSkype for Business Server 2015 CU13
[{"status": "affected", "version": "9319.0", "lessThan": "6.0.9319.869", "versionType": "custom"}]unknown
MicrosoftSkype for Business Server 2019 CU7
[{"status": "affected", "version": "2046.0", "lessThan": "7.0.246.530", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_7:*:*:*:*:*:*supported

Assessments

CVSS by origin

5.3
secure@microsoft.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3
microsoftCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.