CVE-2025-1055
K7 Computing K7RKScan.sys driver (BYOVD)
A vulnerability in the K7RKScan.sys driver, part of the K7 Security Anti-Malware suite, allows a local low-privilege user to send crafted IOCTL requests to terminate a wide range of processes running with administrative or system-level privileges, with the exception of those inherently protected by the operating system. This flaw stems from missing access control in the driver's IOCTL handler, enabling unprivileged users to perform privileged actions in kernel space. Successful exploitation can lead to denial of service by disrupting critical services or privileged applications.
Ransomware groups exploiting CVE-2025-1055
The Warlock ransomware and operator(s) are believed to be attributed to Storm-2603, a China-based threat actor who is also known to have deployed LockBit ransomware. There's also a crossover between victims with Black Basta. Both are RaaS and have a long list
Exploitation is attributed to these groups across their recorded activity. It does not follow that every organisation they listed was reached through CVE-2025-1055 — the source data does not record an entry point per incident.
Exploitation status
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 0.2%, which is higher than 14.8% 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:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Recent listings by these groups
Disclosures from the groups above, newest first.
Frequently asked questions
Is CVE-2025-1055 being exploited by ransomware groups?
Yes. CVE-2025-1055 is recorded as exploited by Warlock. Between them these groups account for 78 victim disclosures in this database.
What does CVE-2025-1055 affect?
CVE-2025-1055 affects K7 Computing K7RKScan.sys driver (BYOVD). A vulnerability in the K7RKScan.sys driver, part of the K7 Security Anti-Malware suite, allows a local low-privilege user to send crafted IOCTL requests to terminate a wide range of processes running with administrative or system-level privileges, with the exception of those inherently protected by the operating system. This flaw stems from missing access control in the driver's IOCTL handler, enabling unprivileged users to perform privileged actions in kernel space. Successful exploitation can lead to denial of service by disrupting critical services or privileged applications.
How severe is CVE-2025-1055?
CVE-2025-1055 is rated MEDIUM with a CVSS base score of 5.6. EPSS puts the probability of exploitation in the next 30 days at 0.2%, higher than 14.8% of all scored vulnerabilities. It is not currently in the CISA Known Exploited Vulnerabilities catalog.
How should organisations respond to CVE-2025-1055?
Apply the vendor patch for K7 Computing K7RKScan.sys driver (BYOVD) 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.