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CVE-2026-55009highCWE-502

Microsoft Exchange Server Elevation of Privilege Vulnerability

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 1.7%
exploitation probability
1.7%top 26% of all CVEs
observed exploitation
nono source reports it
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C