CVE-2026-15409
SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
SonicWall SMA1000 Appliances
A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A remote unauthenticated attacker could potentially cause the appliance to make requests to unintended location.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 14 July 2026. US federal agencies were required to remediate it by 17 July 2026. 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 78.4%, which is higher than 99.5% 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:N/UI:N/S:C/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-15409 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-15409.
What does CVE-2026-15409 affect?
CVE-2026-15409 affects SonicWall SMA1000 Appliances. A Server-side request forgery (SSRF) vulnerability has been identified in the SMA1000 Appliance Work Place interface. A remote unauthenticated attacker could potentially cause the appliance to make requests to unintended location.
How severe is CVE-2026-15409?
CVE-2026-15409 is rated CRITICAL with a CVSS base score of 10. EPSS puts the probability of exploitation in the next 30 days at 78.4%, higher than 99.5% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 17 July 2026.
How should organisations respond to CVE-2026-15409?
Apply the vendor patch for SonicWall SMA1000 Appliances 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.