How severe is CVE-2023-41763?

CVE-2023-41763 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-41763 being actively exploited?

Yes. CVE-2023-41763 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-10, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-41763?

CVE-2023-41763 primarily affects Microsoft Skype For Business Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-41763?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-41763 have an EU (EUVD) identifier?

Yes. CVE-2023-41763 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46255. It is also flagged as exploited in the EUVD (since 2023-10-10).

When was CVE-2023-41763 published?

CVE-2023-41763 was published on 2023-10-10 and last updated on 2026-06-17.

CVE-2023-41763

CVE-2023-41763 is a medium-severity vulnerability in Microsoft Skype For Business Server with a CVSS 3.x base score of 5.3. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-10-10). The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 90% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-10-10)
EU (EUVD) id: EUVD-2023-46255
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-10-10)
Weakness: CWE-918
Affected product: Microsoft Skype For Business Server
Published: 2023-10-10
Last modified: 2026-06-17

Description

Skype for Business Elevation of Privilege Vulnerability

Frequently asked questions

What is CVE-2023-41763?: Skype for Business Elevation of Privilege Vulnerability
How severe is CVE-2023-41763?: CVE-2023-41763 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-41763 being actively exploited?: Yes. CVE-2023-41763 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-10, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-41763?: CVE-2023-41763 primarily affects Microsoft Skype For Business Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-41763?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-41763 have an EU (EUVD) identifier?: Yes. CVE-2023-41763 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46255. It is also flagged as exploited in the EUVD (since 2023-10-10).
When was CVE-2023-41763 published?: CVE-2023-41763 was published on 2023-10-10 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_7:*:*:*:*:*:*

More vulnerabilities in Microsoft Skype For Business Server

CVE-2023-36789 — High (CVSS 7.2): Skype for Business Remote Code Execution Vulnerability
CVE-2023-36786 — High (CVSS 7.2): Skype for Business Remote Code Execution Vulnerability
CVE-2023-36780 — High (CVSS 7.2): Skype for Business Remote Code Execution Vulnerability
CVE-2021-26422 — High (CVSS 7.2): Skype for Business and Lync Remote Code Execution Vulnerability
CVE-2022-26911 — Medium (CVSS 6.5): Skype for Business Information Disclosure Vulnerability
CVE-2021-26421 — Medium (CVSS 6.5): Skype for Business and Lync Spoofing Vulnerability

All CVEs affecting Microsoft Skype For Business Server →

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