CVE-2022-40139
Trend Micro Apex One and Apex One as a Service Improper Validation Vulnerability
Trend Micro Apex One and Apex One as a Service
Improper validation of some components used by the rollback mechanism in Trend Micro Apex One and Trend Micro Apex One as a Service clients could allow a Apex One server administrator to instruct affected clients to download an unverified rollback package, which could lead to remote code execution. Please note: an attacker must first obtain Apex One server administration console access in order to exploit this vulnerability.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 15 September 2022. US federal agencies were required to remediate it by 6 October 2022.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 3.4%, which is higher than 89.1% 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:H/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2022-40139 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2022-40139.
What does CVE-2022-40139 affect?
CVE-2022-40139 affects Trend Micro Apex One and Apex One as a Service. Improper validation of some components used by the rollback mechanism in Trend Micro Apex One and Trend Micro Apex One as a Service clients could allow a Apex One server administrator to instruct affected clients to download an unverified rollback package, which could lead to remote code execution. Please note: an attacker must first obtain Apex One server administration console access in order to exploit this vulnerability.
How severe is CVE-2022-40139?
CVE-2022-40139 is rated HIGH with a CVSS base score of 7.2. EPSS puts the probability of exploitation in the next 30 days at 3.4%, higher than 89.1% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 6 October 2022.
How should organisations respond to CVE-2022-40139?
Apply the vendor patch for Trend Micro Apex One and Apex One as a Service 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.