CVE-2026-0400
Received Received - Intake

Format String Vulnerability in SonicOS Causes Firewall Crash

Publication date: 2026-02-24

Last updated on: 2026-02-26

Assigner: SonicWALL, Inc.

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

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Meta Information

Published
2026-02-24
Last Modified
2026-02-26
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-05
NVD
CVE-2026-0400
EUVD
EUVD-2026-8524

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
sonicwall sonicos to 7.3.2-7010 (exc)
sonicwall sonicos to 8.2.0-8009 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-134 The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

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Executive Summary

This vulnerability is a post-authentication Format String vulnerability found in SonicOS, the operating system used by SonicWall devices. It allows a remote attacker, who has already authenticated, to exploit the format string issue to cause the firewall to crash.

Impact Analysis

The primary impact of this vulnerability is that a remote attacker can crash the firewall. This could lead to denial of service, disrupting network security and potentially causing downtime or loss of protection for the network behind the firewall.

Compliance Impact

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