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Microsoft Exchange(Pwn2Own) Microsoft Exchange External Control of File Path Remote Code Execution Vulnerability

Risk 88

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-62911.

First published (updated )
Advisory
ZDI-26-535

Microsoft ExchangeZDI-26-535: (Pwn2Own) Microsoft Exchange External Control of File Path Remote Code Execution Vulnerability

Risk 86

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-62911.

First published (updated )
ZDI-CAN-31481

Microsoft ExchangeZDI-26-538: (Pwn2Own) Microsoft Exchange Improper Authorization Privilege Escalation Vulnerability

Risk 78

This vulnerability allows remote attackers to escalate privileges on affected installations of Microsoft Exchange. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-62911.

First published (updated )
ZDI-CAN-31480

Microsoft Exchange(Pwn2Own) Microsoft Exchange Improper Authorization Privilege Escalation Vulnerability

Risk 78

This vulnerability allows remote attackers to escalate privileges on affected installations of Microsoft Exchange. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-62911.

First published (updated )
Advisory
ZDI-26-538

Microsoft ExchangeZDI-26-194: Microsoft Exchange InterceptorSmtpAgent Improper Input Validation Security Feature Bypass Vulnerability

Risk 53

This vulnerability allows remote attackers to bypass a security feature on affected installations of Microsoft Exchange. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.3. The following CVEs are assigned: CVE-2026-21527.

First published (updated )
ZDI-CAN-28462

Microsoft ExchangeMicrosoft Exchange InterceptorSmtpAgent Improper Input Validation Security Feature Bypass Vulnerability

Risk 53

This vulnerability allows remote attackers to bypass a security feature on affected installations of Microsoft Exchange. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.3. The following CVEs are assigned: CVE-2026-21527.

First published (updated )
Advisory
ZDI-26-194

Microsoft ExchangeIn Microsoft Exchange through 2019, Exchange ActiveSync (EAS) configurations on on-premises servers …

Risk 43
Severity
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

In Microsoft Exchange through 2019, Exchange ActiveSync (EAS) configurations on on-premises servers may transmit sensitive data from Samsung mobile devices in cleartext, including the user's name, e-mail address, device ID, bearer token, and base64-encoded password.

First published (updated )
CVE-2025-58107

Microsoft ExchangeMicrosoft Exchange InterceptorSmtpAgent Reliance on Untrusted Inputs Security Feature Bypass Vulnerability

Risk 53

This vulnerability allows remote attackers to bypass a security feature on affected installations of Microsoft Exchange. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.3. The following CVEs are assigned: CVE-2026-21527.

First published (updated )
Advisory
ZDI-26-082

Microsoft ExchangeZDI-26-082: Microsoft Exchange InterceptorSmtpAgent Reliance on Untrusted Inputs Security Feature Bypass Vulnerability

Risk 53

This vulnerability allows remote attackers to bypass a security feature on affected installations of Microsoft Exchange. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.3. The following CVEs are assigned: CVE-2026-21527.

First published (updated )
ZDI-CAN-28410

Microsoft ExchangeZDI-23-1641: Microsoft Exchange FederationTrust Deserialization of Untrusted Data NTLM Relay Vulnerability

Risk 51

This vulnerability allows remote attackers to relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36039.

First published (updated )
ZDI-CAN-22002

Microsoft ExchangeMicrosoft Exchange FederationTrust Deserialization of Untrusted Data NTLM Relay Vulnerability

Risk 50

This vulnerability allows remote attackers to relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36039.

First published (updated )
Advisory
ZDI-23-1641

Microsoft ExchangeZDI-23-1637: Microsoft Exchange IsUNCPath Improper Input Validation NTLM Relay Vulnerability

Risk 51

This vulnerability allows remote attackers to relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36035.

First published (updated )
ZDI-CAN-21983

Microsoft ExchangeMicrosoft Exchange IsUNCPath Improper Input Validation NTLM Relay Vulnerability

Risk 43

This vulnerability allows remote attackers to relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36035.

First published (updated )
Advisory
ZDI-23-1637

Microsoft ExchangeZDI-23-1646: Microsoft Exchange GsmWriter Deserialization of Untrusted Data NTLM Relay Vulnerability

Risk 45

This vulnerability allows remote attackers to create a denial-of-service condition or relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-38181.

First published (updated )
ZDI-CAN-21462

Microsoft ExchangeMicrosoft Exchange GsmWriter Deserialization of Untrusted Data NTLM Relay Vulnerability

Risk 43

This vulnerability allows remote attackers to create a denial-of-service condition or relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-38181.

First published (updated )
Advisory
ZDI-23-1646

Microsoft ExchangeMicrosoft Exchange TransportConfigContainer Deserialization of Untrusted Data Information Disclosure Vulnerability

Risk 37

This vulnerability allows remote attackers to disclose sensitive information or relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36050.

First published (updated )
Advisory
ZDI-23-1640

Microsoft ExchangeZDI-23-1640: Microsoft Exchange TransportConfigContainer Deserialization of Untrusted Data Information Disclosure Vulnerability

Risk 37

This vulnerability allows remote attackers to disclose sensitive information or relay NTLM credentials on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2023-36050.

First published (updated )
ZDI-CAN-21958

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