Technology · Microsoft
Microsoft Skype for Business vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 12 vulnerabilities in Microsoft Skype for Business: 0 in the last 7 days and 11 in the last 90 days, 2 of them critical and 1 exploited in the wild. The most recent, CVE-2026-85873, was published on 13 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 11
- Critical, all time
- 2
- Exploited in the wild
- 1
About Microsoft Skype for Business
Unified communications platform for enterprise messaging, video conferencing, and collaboration.
Latest Microsoft Skype for Business vulnerabilities
- CVE-2026-85873: Microsoft Skype for Business and Lync privilege escalationmediumCVSS 6.5EPSS 0.8%
- CVE-2026-69646: Microsoft Skype for Business cryptographic signature spoofinghighCVSS 8.3EPSS 0.3%
- CVE-2026-69642: Microsoft Skype for Business cross-site scripting in web page generationmediumCVSS 6.5EPSS 0.4%
- CVE-2026-66308: Microsoft Skype for Business out-of-bounds readmediumCVSS 6.5EPSS 1.1%
- CVE-2026-66307: Microsoft Skype for Business integer underflow denial of servicehighCVSS 7.5EPSS 1.2%
- CVE-2026-66306: Microsoft Skype for Business information disclosure in error messagesmediumCVSS 6.5EPSS 0.9%
- CVE-2026-66305: Microsoft Skype for Business authentication spoofinghighCVSS 7.1EPSS 0.5%
- CVE-2026-66304: Microsoft Skype for Business server-side request forgeryhighCVSS 7.5EPSS 1.0%
- CVE-2026-66303: Microsoft Skype for Business null pointer dereferencemediumCVSS 6.5EPSS 1.1%
- CVE-2026-66302: Microsoft Skype for Business arbitrary code execution via path traversalcriticalCVSS 9.8EPSS 1.0%
- CVE-2026-63523: Microsoft Skype for Business XSS in web page generationmediumCVSS 6.5EPSS 0.5%
- CVE-2023-41763: Microsoft Skype for Business Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 5.3
Most severe Microsoft Skype for Business vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2023-41763: Microsoft Skype for Business Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 5.3
- CVE-2026-66302: Microsoft Skype for Business arbitrary code execution via path traversalcriticalCVSS 9.8EPSS 1.0%
- CVE-2026-69646: Microsoft Skype for Business cryptographic signature spoofinghighCVSS 8.3EPSS 0.3%
- CVE-2026-66307: Microsoft Skype for Business integer underflow denial of servicehighCVSS 7.5EPSS 1.2%
- CVE-2026-66304: Microsoft Skype for Business server-side request forgeryhighCVSS 7.5EPSS 1.0%
- CVE-2026-66305: Microsoft Skype for Business authentication spoofinghighCVSS 7.1EPSS 0.5%
- CVE-2026-66308: Microsoft Skype for Business out-of-bounds readmediumCVSS 6.5EPSS 1.1%
- CVE-2026-66303: Microsoft Skype for Business null pointer dereferencemediumCVSS 6.5EPSS 1.1%
- CVE-2026-66306: Microsoft Skype for Business information disclosure in error messagesmediumCVSS 6.5EPSS 0.9%
- CVE-2026-85873: Microsoft Skype for Business and Lync privilege escalationmediumCVSS 6.5EPSS 0.8%
Vulnerabilities per week
1 vulnerability in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 10 | 1 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Microsoft Skype for Business vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/skype-for-business)<a href="https://junglewise.ai/threats/technologies/skype-for-business"><img src="https://junglewise.ai/threats/technologies/skype-for-business/badge.svg" alt="Microsoft Skype for Business vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/skype-for-business.json, and this page as text at https://junglewise.ai/threats/technologies/skype-for-business.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Microsoft Skype for Business vulnerabilities", https://junglewise.ai/threats/technologies/skype-for-business, 13 November 2026.