CVE-2026-0400

Name: CVE-2026-0400
Creator: NVD / NIST
Published: 2026-02-24T15:21:37.127+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2026-0400 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A post-authentication Format String vulnerability in SonicOS allows a remote attacker to crash a firewall.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

4.9/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.43%

34.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-134

Affected Software

Vendor	Product	Versions
Sonicwall	Sonicos	< 7.3.2-7010
Sonicwall	Sonicos	< 8.2.0-8009

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001Vendor Advisory

Timeline

Published: Feb 24, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-0400?

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

How severe is CVE-2026-0400?

CVE-2026-0400 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0400?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-0400?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST