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CVE-20XX-?

CVE-2026-69646

8.3 HIGH 0.3% exploit odds Fix listed Crypto Server

What it is

Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-08 19:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-16 19:26 UTC Last updatedMost recent change to the record

Details

Published: 2026-09-08 19:19 UTC
Last modified: 2026-09-16 19:26 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-347
Record status: Analyzed

Affected

Microsoft Skype For Business Server 2015
Microsoft Skype For Business Server 2019
Microsoft Skype For Business Server Subscription Edition 7.0.2046.849

Attack profile CVSS 3.1 · 8.3

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: Low

Raw vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Meme: I wake up, CVE-2026-69646

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Fix and advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646

NVD record · CVE.org record