Out-of-bounds Read Vulnerability in SonicOS Firewall by SonicWall
CVE-2026-0402

4.9MEDIUM

Key Information:

Vendor

Sonicwall
Status
Sonicos
Vendor
CVE Published:
24 February 2026

What is CVE-2026-0402?

A post-authentication out-of-bounds read vulnerability has been identified in SonicOS, which enables a remote attacker to perform unauthorized operations that can lead to a crash of the firewall. This vulnerability can be exploited to compromise the integrity and availability of the impacted system, resulting in service disruption.

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Affected Version(s)

SonicOS Linux 7.0.1-5169 and older versions

SonicOS Linux 7.3.1-7013 and older versions

SonicOS Linux 8.1.0-8017 and older versions

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-202...
vendor-advisory

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Vang3lis of VARAS@IIE
N3vv of Red-Shield Security Lab
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