CVE-2025-2783
Google Chromium Mojo Sandbox Escape Vulnerability
Google Chromium Mojo
Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 27 March 2025. US federal agencies were required to remediate it by 17 April 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 9.2%, which is higher than 95.4% 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:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-2783 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-2783.
What does CVE-2025-2783 affect?
CVE-2025-2783 affects Google Chromium Mojo. Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)
How severe is CVE-2025-2783?
CVE-2025-2783 is rated HIGH with a CVSS base score of 8.3. EPSS puts the probability of exploitation in the next 30 days at 9.2%, higher than 95.4% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 17 April 2025.
How should organisations respond to CVE-2025-2783?
Apply the vendor patch for Google Chromium Mojo 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.