SB2026022447 - Multiple DoS vulnerabilities in SonicOS
Published: February 24, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2026-0399)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to a boundary error. A remote privileged user can send specially crafted data to the device, trigger a stack-based buffer overflow and perform a denial of service attack.
2) Format string error (CVE-ID: CVE-2026-0400)
CWE-ID: CWE-134 - Use of Externally-Controlled Format String
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to a format string error. A remote privileged user can supply a specially crafted input to the system and perform a denial of service attack
3) NULL pointer dereference (CVE-ID: CVE-2026-0401)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote privileged user cker can pass specially crafted data to the system and perform a denial of service (DoS) attack.
4) Out-of-bounds read (CVE-ID: CVE-2026-0402)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to a boundary condition. A remote privileged user can trigger an out-of-bounds read error and perform a denial of service attack.
Remediation
Install update from vendor's website.