CVE-2026-0400 — Use of Externally-Controlled Format String in Sonicos

CWE-134 — Use of Externally-Controlled Format String3 documents3 sources
Severity
4.9MEDIUMNVD
EPSS
0.2%
top 55.78%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Sonicwall Sonicos
Timeline
PublishedFeb 24

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HExploitability: 1.2 | Impact: 3.6

Affected Packages2 packages

▶NVDsonicwall/sonicos< 7.3.2-7010+1
▶CVEListV5sonicwall/sonicos7.0.1-5169 and older versions, 7.3.1-7013 and older versions, 8.1.0-8017 and older versions+2

🔴Vulnerability Details

2
GHSA
GHSA-3q93-28v9-5x6v: A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall↗2026-02-24
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CVEList
CVE-2026-0400: A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall↗2026-02-24
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CVE-2026-0400 — Sonicwall Sonicos vulnerability | cvebase