Skype for Business and Microsoft Lync
CVE-2026-83746 — Skype for Business Elevation of Privilege Vulnerability
Executive Summary
Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
Overview
8.1
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.1
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Skype for Business Server 2015 CU13 | 5132779 (Security Update) |
Important | Elevation of Privilege | No |
| Skype for Business Server 2019 CU8 | 5131693 (Security Update) |
Important | Elevation of Privilege | No |
| Skype for Business Server Subscription Edition CU1 | 5131692 (Security Update) |
Important | Elevation of Privilege | No |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5132779 |
Security Update | No |
5131693 |
Security Update | No |
5131692 |
Security Update | No |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
P1hcn
References
On This Page