CVE-2026-69646
HIGHCVSS 8.3/10EPSS 0.21%
Last modified
CVE-2026-69646 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
Description
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Skype For Business Server | 2015 | Cumulative Update 13 |
| Microsoft | Skype For Business Server | 2019 | Cumulative Update 8 |
| Microsoft | Skype For Business Server Subscription Edition | 7.0.2046.849 | — |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-69646?
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
How severe is CVE-2026-69646?
CVE-2026-69646 has a CVSS score of 8.3/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-69646?
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
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Are you affected by CVE-2026-69646?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST