Microsoft Server Exchange Server Vulnerabilities & Security Advisories
54 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, 32 high, 12 medium.
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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
High [CVE-2026-54998] Microsoft Exchange Online Elevation of Privilege Vulnerability
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
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.
High [CVE-2026-45503] Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Information Disclosure Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server Subscription Edition RTM; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2019 Cumulative Update 14.
High [CVE-2026-45504] Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability Affected products named by the advisory: Microsoft Exchange Server Subscription Edition RTM; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 14.
High [CVE-2026-45583] 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 23; Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server Subscription Edition RTM.
Medium [CVE-2026-45500] 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 Subscription Edition RTM; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2016 Cumulative Update 23.
Medium [CVE-2026-45501] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability Affected products named by the advisory: Microsoft Exchange Server Subscription Edition RTM; Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2019 Cumulative Update 14.
Medium [CVE-2026-45502] Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Information Disclosure Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 14; Microsoft Exchange Server 2019 Cumulative Update 15; Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server Subscription Edition RTM.
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.
High [CVE-2026-42897] Microsoft Exchange Server Spoofing Vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. 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.
Medium [CVE-2026-21527] Microsoft Exchange Server Spoofing Vulnerability
User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. 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-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.
High [CVE-2023-38181] 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 12; Microsoft Exchange Server 2019 Cumulative Update 13.
High [CVE-2023-38182] 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 23; Microsoft Exchange Server 2019 Cumulative Update 12; Microsoft Exchange Server 2019 Cumulative Update 13.
High [CVE-2023-35368] Microsoft Exchange Remote Code Execution Vulnerability
Microsoft Exchange Remote Code Execution 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.
High [CVE-2023-21710] 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 23; Microsoft Exchange Server 2019 Cumulative Update 11; Microsoft Exchange Server 2019 Cumulative Update 12.
High [CVE-2023-21529] 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 23; Microsoft Exchange Server 2019 Cumulative Update 11; Microsoft Exchange Server 2019 Cumulative Update 12.
High [CVE-2022-41078] Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server Spoofing Vulnerability Affected products named by the advisory: Microsoft Exchange Server 2013 Cumulative Update 23; Microsoft Exchange Server 2016 Cumulative Update 22; Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 11; and 1 more. Affected products named by the advisory: Microsoft Exchange Server 2019 Cumulative Update 12.
High [CVE-2022-41123] 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 22; Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 11; Microsoft Exchange Server 2019 Cumulative Update 12.