CVE-2023-36789
CVE-2023-36789 is a high-severity vulnerability in Microsoft Skype For Business Server with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Microsoft Skype For Business Server
- Published:
- Last modified:
Description
Skype for Business Remote Code Execution Vulnerability
Frequently asked questions
- What is CVE-2023-36789?
- Skype for Business Remote Code Execution Vulnerability
- How severe is CVE-2023-36789?
- CVE-2023-36789 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-36789 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-36789?
- CVE-2023-36789 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-2023-36789?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-36789 published?
- CVE-2023-36789 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-2023-36786 — 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
- CVE-2021-24099 — Medium (CVSS 6.5): Skype for Business and Lync Denial of Service Vulnerability
All CVEs affecting Microsoft Skype For Business Server →
Other CWE-94 (Code Injection) vulnerabilities
- CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
- CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
- CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
- CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
- CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
- CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.