CVE-2026-55007: high-severity vulnerability in Microsoft Exchange Server 2019 Cumulative…
Microsoft Exchange Server Remote Code Execution Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.7%
Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft Exchange Server 2019 Cumulative Update 14Microsoft · Microsoft Exchange Server 2019 Cumulative Update 15Microsoft · Microsoft Exchange Server Subscription Edition RTMRelated CVEs — Microsoft Exchange Server 2019 Cumulative…
In the same product, most dangerous first.
CVE-2026-42897HIGHMicrosoft Exchange Server Spoofing VulnerabilityEPSS 70.7%KEVCVE-2024-21410CRITICALMicrosoft Exchange Server Elevation of Privilege VulnerabilityEPSS 12.7%KEVCVE-2026-45502MEDIUMMicrosoft Exchange Server Information Disclosure VulnerabilityEPSS 20.3%CVE-2024-49040HIGHMicrosoft Exchange Server Spoofing VulnerabilityEPSS 8.5%CVE-2026-21527MEDIUMMicrosoft Exchange Server Spoofing VulnerabilityEPSS 8.3%CVE-2025-53786HIGHMicrosoft Exchange Server Hybrid Deployment Elevation of Privilege VulnerabilityEPSS 7.6%