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4.9
SonicOS Firewall Can Crash from Remote Attack
CVE-2026-0400
Summary
A security weakness in SonicOS software, used in firewalls, could allow a remote attacker to crash the firewall remotely, disrupting network security. This is a concern because it could leave a network without a functioning firewall, making it vulnerable to unauthorized access. Update SonicOS to the latest version to address this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| sonicwall | sonicos | <= 7.3.2-7010 | – |
| sonicwall | sonicos | <= 8.2.0-8009 | – |
Original title
A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.
Original description
A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.
nvd CVSS3.1
4.9
Vulnerability type
CWE-134
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001 Vendor Advisory
Published: 24 Feb 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026