Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-83746Skype for Business Elevation of Privilege Vulnerability
High 8.1
In plain English
A high-severity security flaw in Skype for Business Server 2015 CU13 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)1.1%top 33.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Skype for Business Server 2015 CU13 | 9319.0 – before 6.0.9319.886 |
| Microsoft | Skype for Business Server 2019 CU8 | 2046.0 – before 7.0.2046.583 |
| Microsoft | Skype for Business Server Subscription Edition CU1 | 2046.0 – before 7.0.2046.889 |
Weakness: CWE-36 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C
References
- Skype for Business Elevation of Privilege Vulnerability vendor-advisory, patch