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CVE-2023-41763

Skype for Business Elevation of Privilege Vulnerability

MEDIUM
5.3
CVSS Score
Published: October 10, 2023 at 05:07 PM UTC
Updated: June 17, 2026 at 06:22 AM UTC
1 product affected across 1 vendorSkype for Business Server

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Severity
MEDIUM5.3
Exploitation
CISA KEV
Exploit prediction
EPSS 91%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score90.5%

EPSS (Exploit Prediction Scoring System) estimates a 90.5% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Oct 10, 2023
Remediation Due
Oct 31, 2023
1093 days overdue
Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-41763
https://nvd.nist.gov/vuln/detail/CVE-2023-41763

Description

Skype for Business Elevation of Privilege Vulnerability

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Skype for Business Server· Microsoft
95%
2046.0 ≤ v < 7.0.246.5309319.0 ≤ v < 6.0.9319.8692015 cumulative_update_132019 cumulative_update_72046.09319.0
Affected range stops below 6.0.9319.869, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.246.530, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41763
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-41763

SSVC — Action Prioritization

SSVCActiveAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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