CVE-2026-85873
MEDIUMCVSS 6.5/10EPSS 0.82%
Last modified
CVE-2026-85873 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.. EPSS estimates a 0.82% chance of exploitation in the next 30 days.
Description
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Skype for Business Server 2015 CU13 | >= 9319.0, < 6.0.9319.886 |
| Microsoft | Skype for Business Server 2019 CU8 | >= 2046.0, < 7.0.2046.583 |
| Microsoft | Skype for Business Server Subscription Edition CU1 | >= 2046.0, < 7.0.2046.889 |
References
Timeline
- Published
- Last Modified
- Status
- Undergoing Analysis
Frequently Asked Questions
What is CVE-2026-85873?
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-85873?
CVE-2026-85873 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.
How do I fix CVE-2026-85873?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-85868Use after free in Windows Common Log File System Driver allo…7
- CVE-2026-85869Heap-based buffer overflow in Microsoft Windows Search Compo…7.8
- CVE-2026-8587Use after free in Extensions in Google Chrome on Mac prior t…8.8
- CVE-2026-85870Heap-based buffer overflow in Windows Common Log File System…7
- CVE-2026-85871Heap-based buffer overflow in Windows Kernel-Mode Drivers al…7.8
- CVE-2026-85872Use after free in Windows Storage VSP Driver allows an autho…7.8
- CVE-2026-85874Use after free in Windows Message Queuing Queue Manager allo…7.8
- CVE-2026-85875Out-of-bounds read in Microsoft Office Excel allows an unaut…5.5
- CVE-2026-85876Use after free in SQL Server allows an authorized attacker t…7
- CVE-2026-85877Heap-based buffer overflow in Windows Print Spooler Componen…8.8
- CVE-2026-85878Improper authorization in Azure Database for PostgreSQL allo…9.9
- CVE-2026-85879Time-of-check time-of-use (toctou) race condition in Windows…7
Are you affected by CVE-2026-85873?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST