Microsoft Exchange Server vulnerabilities
58 known CVE vulnerabilities in Microsoft Exchange Server, translated and rated.
- CVE-2026-55008Critical
A cross-site scripting (XSS) vulnerability in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. The flaw is due to improper neutralization of input during web page generation.
- CVE-2026-45502Medium
A Server-Side Request Forgery (SSRF) vulnerability in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
- CVE-2026-42897HighActively exploited
Microsoft Exchange Server has an improper neutralization of input during web page generation, leading to a cross-site scripting vulnerability. This flaw allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-21527Medium
A flaw in the user interface of Microsoft Exchange Server leads to misrepresentation of critical information, allowing an unauthorized attacker to perform spoofing over a network.
- CVE-2025-53786High
On April 18th, 2025, Microsoft announced security changes for Exchange Server in hybrid deployments and accompanying hot fixes. Further investigation revealed specific security implications related to these changes.
- CVE-2023-38182High
A vulnerability in Microsoft Exchange Server allows for remote code execution. An attacker can exploit this flaw to gain control over the system.
- CVE-2023-38181High
A vulnerability in Microsoft Exchange Server allows attackers to spoof other email addresses. Exploiting this flaw could lead to email communication fraud.
- CVE-2023-35388High
A vulnerability in Microsoft Exchange Server allows for remote code execution. An attacker can exploit this flaw to gain control over the system.
- CVE-2023-21709Critical
Elevation of privilege vulnerability in Microsoft Exchange Server. It allows an attacker to elevate their privileges in the system.
- CVE-2023-21707High
Remote code execution vulnerability in Microsoft Exchange Server. Allows an attacker to execute arbitrary code in the context of the Exchange server.
- CVE-2022-41080HighActively exploited
Elevation of privilege vulnerability in Microsoft Exchange Server. Allows an attacker to elevate their privileges in the system.
- CVE-2021-42321HighActively exploited
Microsoft Exchange Server Remote Code Execution Vulnerability. Details are not provided in the description, but it is a serious flaw allowing remote code execution.
- CVE-2021-42305Medium
Spoofing vulnerability in Microsoft Exchange Server. An attacker can impersonate another entity, potentially leading to fraud or unauthorized actions.
- CVE-2021-41349Medium
Spoofing vulnerability in Microsoft Exchange Server. An attacker can impersonate another entity, potentially leading to fraud or unauthorized actions.
- CVE-2021-34523CriticalActively exploited
Elevation of privilege vulnerability in Microsoft Exchange Server. Allows an attacker to elevate their privileges in the system.
- CVE-2021-34473CriticalActively exploited
Remote code execution vulnerability in Microsoft Exchange Server. Allows an attacker to execute arbitrary code remotely on the server.
- CVE-2021-33766HighActively exploited
Information disclosure vulnerability in Microsoft Exchange Server. Allows an attacker to access sensitive information.
- CVE-2021-31206High
Remote code execution vulnerability in Microsoft Exchange Server. Allows an attacker to execute code remotely on the server.
- CVE-2021-31196HighActively exploited
A remote code execution vulnerability in Microsoft Exchange Server.
- CVE-2021-27078Critical
Remote code execution vulnerability in Microsoft Exchange Server. Allows an attacker to execute arbitrary code on the server.
- CVE-2021-27065HighActively exploited
A remote code execution vulnerability in Microsoft Exchange Server allows an attacker to execute arbitrary code in the context of the system on the Exchange server.
- CVE-2021-26858HighActively exploited
A remote code execution vulnerability in Microsoft Exchange Server allows an attacker to execute arbitrary code on the server.
- CVE-2021-26857HighActively exploited
A remote code execution vulnerability in Microsoft Exchange Server allows an attacker to execute arbitrary code on the server.
- CVE-2021-26855CriticalActively exploited
Microsoft Exchange Server contains a remote code execution vulnerability. This vulnerability can be exploited by an attacker to execute arbitrary code on the server.
- CVE-2021-26854Medium
Remote code execution vulnerability in Microsoft Exchange Server. An attacker can exploit this flaw to execute arbitrary code on the server.
- CVE-2021-26412Critical
Remote code execution vulnerability in Microsoft Exchange Server. Allows an attacker to execute arbitrary code on the server.
- CVE-2026-65813Medium
Server-side request forgery (SSRF) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-62915Medium
A missing authorization vulnerability in Microsoft Exchange Server allows an authorized attacker to bypass a security feature over a network.
- CVE-2026-62914High
Improper neutralization of input during web page generation (cross-site scripting) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- CVE-2026-62913High
Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
- CVE-2026-62912Medium
A deserialization of untrusted data vulnerability in Microsoft Exchange Server allows an authorized attacker to deny service over a network.
- CVE-2026-62911High
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-62910High
Improper control of resource identifiers (resource injection) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-55009High
A deserialization of untrusted data vulnerability in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
- CVE-2026-55006High
Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
- CVE-2026-55005High
A heap-based buffer overflow vulnerability in Microsoft Exchange Server allows an authorized attacker to execute code remotely over a network.
- CVE-2026-47631High
A cross-site scripting (XSS) vulnerability in Microsoft Exchange Server due to improper input neutralization during web page generation. Allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-45583High
Code injection vulnerability in Microsoft Exchange Server. An unauthorized attacker can remotely execute code over the network.
- CVE-2026-45504High
Server-Side Request Forgery (SSRF) vulnerability in Microsoft Exchange Server. An authorized attacker can elevate privileges over a network.
- CVE-2026-45503High
Improper authorization vulnerability in Microsoft Exchange Server. An authorized attacker can exploit this vulnerability to disclose information over a network.
- CVE-2026-45501Medium
Server-side request forgery (SSRF) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
- CVE-2026-45500Medium
Cross-site scripting (XSS) vulnerability in Microsoft Exchange Server. An unauthorized attacker can perform spoofing over a network.
- CVE-2025-64667Medium
A flaw in the user interface of Microsoft Exchange Server leads to misrepresentation of critical information, allowing an unauthorized attacker to perform spoofing over a network.
- CVE-2025-64666High
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2025-59249High
Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2025-59248High
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- CVE-2025-53782High
Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.
- CVE-2025-33051High
Microsoft Exchange Server has a vulnerability that allows an unauthorized attacker to disclose sensitive information over a network.
- CVE-2025-25007Medium
Improper validation of syntactic correctness of input in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- CVE-2025-25006Medium
Improper handling of additional special element in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

