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Exchange Server vulnerabilities

13 published alerts for Microsoft Exchange Server.

Actively exploited (KEV)Ransomware

CVE-2023-21529

Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2023-21529). Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution. CISA remediation due date: 2026-04-27. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2022-41080

Microsoft Exchange Server Privilege Escalation Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2022-41080). Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation. This vulnerability is chainable with CVE-2022-41082, which allows for remote code execution. CISA remediation due date: 2023-01-31. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2022-41082

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2022-41082). Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution. CISA remediation due date: 2022-10-21. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2022-41040

Microsoft Exchange Server Server-Side Request Forgery Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2022-41040). Microsoft Exchange Server allows for server-side request forgery. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution. CISA remediation due date: 2022-10-21. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2018-8581

Microsoft Exchange Server Privilege Escalation Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2018-8581). A privilege escalation vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could attempt to impersonate any other user of the Exchange server. CISA remediation due date: 2022-03-17. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-34523

Microsoft Exchange Server Privilege Escalation Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-34523). Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation. CISA remediation due date: 2021-11-17. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-34473

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-34473). Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. CISA remediation due date: 2021-11-17. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-31207

Microsoft Exchange Server Security Feature Bypass Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-31207). Microsoft Exchange Server contains an unspecified vulnerability that allows for security feature bypass. CISA remediation due date: 2021-11-17. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-27065

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-27065). Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-26858

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-26858). Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-26857

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-26857). Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2021-26855

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2021-26855). Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.

Actively exploited (KEV)Ransomware

CVE-2020-0688

Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability

Microsoft Exchange Server is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2020-0688). Microsoft Exchange Server Validation Key fails to properly create unique keys at install time, allowing for remote code execution. CISA remediation due date: 2022-05-03. If you need help checking exposure, call (864) 335-9223.