VulnerabilityUndergoing Analysis

CVE-2026-66306

Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.

MEDIUM 6.5EPSS 0.51%

Does this matter?

Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.

Description

Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS: 0.51% probability · 42th percentile
CISA KEV: Not listed
Weakness: CWE-209
Source: secure@microsoft.com

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66306

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.