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CVE-2026-55009

HIGH
7.8
CVSS 3.1

Metadata

CVE ID
CVE-2026-55009
State
PUBLISHED
Assigner
microsoft
Reserved
2026-06-16 14:12 UTC
Published
2026-07-14 17:05 UTC
Last updated
2026-07-14 19:29 UTC
Primary CWE
CWE-502
CWE-502: Deserialization of Untrusted Data
Vendor / Product
Microsoft / Microsoft Exchange Server 2016 Cumulative Update 23
Sources
cve.org  ·  NVD

Severity & Metrics

7.8 HIGH CVSS 3.1
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (4)
VendorProductPlatformVersions
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 x64-based Systems 15.01.0.0 < 15.01.2507.071
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 x64-based Systems 15.02.0.0 < 15.02.1544.043
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 x64-based Systems 15.02.0.0 < 15.02.1748.048
Microsoft Microsoft Exchange Server Subscription Edition RTM x64-based Systems 15.02.0.0 < 15.02.2562.045
Weakness (CWE)
CWESourceDescription
CWE-502 cna CWE-502: Deserialization of Untrusted Data
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.8 HIGH 3.1 cna 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
References (1)
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