Microsoft Server Exchange Server Vulnerabilities & Security Advisories
55 advisories tracked · Microsoft Security Update Guide (MSRC) · 13 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Microsoft Server advisory that VulniPulse classified as Exchange Server, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 13 critical, 33 high, 12 medium.
Android app · Google Play
Monitor MS Server CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Source
Microsoft Security Update Guide (MSRC)
Polled via the official MSRC Security Update Guide RSS feed (api.msrc.microsoft.com, no credentials required), scoped to SERVER products only — Windows Server, Exchange, SQL Server, SharePoint, Hyper-V and companion server roles. Client-only CVEs (Edge, Office apps, consumer Windows) are filtered out via the monthly CVRF document's affected-product list.
Latest MS Server Exchange Server advisories
Critical [CVE-2026-69641] Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server Subscription Edition RTM.
Critical [CVE-2026-69356] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server Subscription Edition RTM; Microsoft Exchange Server 2016 Cumulative Update 23.
Critical [CVE-2026-65801] Microsoft Exchange Online Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges over a network.
Critical [CVE-2026-56191] Microsoft Exchange Online Tampering Vulnerability
Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.
Critical [CVE-2026-55008] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server Subscription Edition RTM.
Critical [CVE-2026-48582] Microsoft Exchange Online Elevation of Privilege Vulnerability
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Critical [CVE-2026-48579] Microsoft Exchange Online Information Disclosure Vulnerability
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
Critical [CVE-2024-21410] Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 13; Microsoft Exchange Server 2019 Cumulative Update 14.
Critical [CVE-2023-21709] Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 12; Microsoft Exchange Server 2019 Cumulative Update 13.
Critical [CVE-2021-34523] Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 19; Microsoft Exchange Server 2016 Cumulative Update 20; Microsoft Exchange Server 2019 Cumulative Update 8; and 1 more. Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 9.
Critical [CVE-2021-34473] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 19; Microsoft Exchange Server 2016 Cumulative Update 20; Microsoft Exchange Server 2019 Cumulative Update 8; and 1 more. Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 9.
Critical [CVE-2021-27078] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 18; Microsoft Exchange Server 2016 Cumulative Update 19; Microsoft Exchange Server 2019 Cumulative Update 7; and 1 more. Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 8.
Critical [CVE-2021-26855] Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 19; Microsoft Exchange Server 2019 Cumulative Update 8; Microsoft Exchange Server 2019; Microsoft Exchange Server 2013 Cumulative Update 22; and 20 more. Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 2; Microsoft Exchange Server 2016 Cumulative Update 13; Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 3; and 16 more.