CVE-2022-41040
Microsoft Exchange Server Server-Side Request Forgery Vulnerability
Microsoft Exchange Server
Microsoft Exchange Server Elevation of Privilege Vulnerability
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 30 September 2022. US federal agencies were required to remediate it by 21 October 2022. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 100%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2022-41040 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2022-41040.
What does CVE-2022-41040 affect?
CVE-2022-41040 affects Microsoft Exchange Server. Microsoft Exchange Server Elevation of Privilege Vulnerability
How severe is CVE-2022-41040?
CVE-2022-41040 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 100%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 21 October 2022.
How should organisations respond to CVE-2022-41040?
Apply the vendor patch for Microsoft Exchange Server as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.