# Skype for Business Server vulnerabilities > Skype for Business Server is made by Microsoft. We track 14 published vulnerabilities in it, across 2 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 10 October 2023. If you run Skype for Business Server, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/microsoft/skype_for_business_server ## At a glance - **Made by:** [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) - **Published vulnerabilities:** 14 - **Known to be exploited:** 1 - **Versions tracked:** 2 - **Most recently added to the known-exploited list:** [CVE-2023-41763](https://www.precursorintelligence.com/what-is/cve-2023-41763), 10 October 2023. We keep watching the list. ## Which versions of Skype for Business Server do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. - [CVE-2023-41763](https://www.precursorintelligence.com/what-is/cve-2023-41763) (Microsoft Skype for Business Privilege Escalation Vulnerability): 2015-cumulative_update_13, 2019-cumulative_update_7 ## Which Skype for Business Server vulnerabilities are being exploited? 1 flaw is on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2023-41763](https://www.precursorintelligence.com/what-is/cve-2023-41763): Microsoft Skype for Business Privilege Escalation Vulnerability. Medium, CVSS 5.3, chance of use in 30 days 91%, known exploited since 10 October 2023. ## Which Skype for Business Server flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2023-41763](https://www.precursorintelligence.com/what-is/cve-2023-41763): 91%, Medium (CVSS 5.3), known exploited - [CVE-2015-2531](https://www.precursorintelligence.com/what-is/cve-2015-2531): 11%, Medium (CVSS 4.3) - [CVE-2015-2536](https://www.precursorintelligence.com/what-is/cve-2015-2536): 8.9%, Medium (CVSS 4.3) - [CVE-2022-26911](https://www.precursorintelligence.com/what-is/cve-2022-26911): 3.6%, Medium (CVSS 6.5) - [CVE-2021-24099](https://www.precursorintelligence.com/what-is/cve-2021-24099): 3.2%, Medium (CVSS 6.5) - [CVE-2023-36780](https://www.precursorintelligence.com/what-is/cve-2023-36780): 2.7%, High (CVSS 7.2) - [CVE-2023-36786](https://www.precursorintelligence.com/what-is/cve-2023-36786): 2.6%, High (CVSS 7.2) - [CVE-2023-36789](https://www.precursorintelligence.com/what-is/cve-2023-36789): 2.5%, High (CVSS 7.2) - [CVE-2022-26910](https://www.precursorintelligence.com/what-is/cve-2022-26910): 2.5%, Medium (CVSS 5.3) - [CVE-2021-26422](https://www.precursorintelligence.com/what-is/cve-2021-26422): 2.2%, High (CVSS 7.2) ## Questions ### How many vulnerabilities does Skype for Business Server have? We track 14 published vulnerabilities listed under the name Skype for Business Server, across 2 versions. The most recent Skype for Business Server flaw added to the known-exploited list is CVE-2023-41763, on 10 October 2023. ### Which Skype for Business Server vulnerabilities are being exploited? 1 is on the list of flaws known to be exploited. The most recently added is CVE-2023-41763. ### Which versions of Skype for Business Server do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2023-41763, affects 2015-cumulative_update_13, 2019-cumulative_update_7. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Skype for Business Server? Create a Precursor Intelligence account and track Skype for Business Server. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Skype for Business Server? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact