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Medium 5.3Known exploited (CISA KEV)Published Oct 10, 2023
CVE-2023-41763Skype for Business Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Skype for Business Server 2015 CU13 and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 10, 2023; federal agencies had to remediate by Oct 31, 2023. Treat that date as your deadline.
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Skype for Business Elevation of Privilege Vulnerability
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-918
- Known exploited
- Added to CISA KEV Oct 10, 2023; federal remediation due Oct 31, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 90.55% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Skype for Business Server 2015 CU13 microsoft:skype_for_business_server_2015_cu13 (from the name) | 9319.0 builds before 6.0.9319.869 | CNA record |
Microsoft Skype for Business Server 2019 CU7 microsoft:skype_for_business_server_2019_cu7 (from the name) | 2046.0 builds before 7.0.246.530 | CNA record |
microsoft skype_for_business_server microsoft:skype_for_business_server | 2015; 2019 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41763vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-41763us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.