Vulnerability · Published Feb 24, 2026 · Assigned by sonicwall

CVE-2026-0400

Medium 4.9

In plain English

A medium-severity security flaw in SonicOS from SonicWall. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.5%top 57.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.

Affected products (as reported)

Vendor	Product	Versions
SonicWall	SonicOS	7.0.1-5169 and older versions7.3.1-7013 and older versions8.1.0-8017 and older versions

Weakness: CWE-134 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001 vendor-advisory