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Vulnerabilities of Microsoft Microsoft Exchange Server 2019 Cumulative Update 15

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CVE Summary Score Published
CVE-2026-55005 Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network 8.8 High Jul 14, 2026
CVE-2026-47631 Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows… 8.1 High Jun 9, 2026
CVE-2026-45504 Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over… 8.8 High Jun 9, 2026
CVE-2026-45583 Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker… 7.5 High Jun 9, 2026
CVE-2026-45502 Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information… 5.0 Medium Jun 9, 2026
CVE-2026-45503 Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network 8.1 High Jun 9, 2026
CVE-2026-45501 Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a… 6.5 Medium Jun 9, 2026
CVE-2026-45500 Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows… 6.1 Medium Jun 9, 2026
CVE-2026-42897 Exploited Microsoft Exchange Server Cross-Site Scripting Vulnerability 8.1 High May 14, 2026
CVE-2026-21527 User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized… 6.5 Medium Feb 10, 2026
CVE-2025-64666 Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a… 7.5 High Dec 9, 2025
CVE-2025-64667 User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized… 5.3 Medium Dec 9, 2025
CVE-2025-59248 Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a… 7.5 High Oct 14, 2025
CVE-2025-59249 Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network 8.8 High Oct 14, 2025
CVE-2025-53782 Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to… 8.4 High Oct 14, 2025
CVE-2025-25006 Improper handling of additional special element in Microsoft Exchange Server allows an unauthorized attacker to… 5.3 Medium Aug 12, 2025
CVE-2025-25007 Improper validation of syntactic correctness of input in Microsoft Exchange Server allows an unauthorized attacker to… 5.3 Medium Aug 12, 2025
CVE-2025-25005 Improper input validation in Microsoft Exchange Server allows an authorized attacker to perform tampering over a network 6.5 Medium Aug 12, 2025
CVE-2025-33051 Exposure of sensitive information to an unauthorized actor in Microsoft Exchange Server allows an unauthorized… 7.5 High Aug 12, 2025
CVE-2025-53786 On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying… 8.0 High Aug 6, 2025

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