Stack-based Buffer Overflow in SonicOS Affects SonicWall Firewalls
CVE-2026-0206

4.9MEDIUM

Key Information:

Vendor

Sonicwall
Status
Sonicos
Vendor
CVE Published:
29 April 2026

What is CVE-2026-0206?

A post-authentication stack-based buffer overflow vulnerability in SonicOS allows a remote attacker to execute actions that can lead to the crash of the firewall. This vulnerability occurs after the user has successfully logged in, posing a unique risk as it can be exploited without requiring additional authentication steps. The affected versions of SonicOS need to be updated to address this critical issue and ensure network security.

Affected Version(s)

SonicOS Linux 6.5.5.1-6n and older versions

SonicOS Linux 7.0.1-5169 and older versions

SonicOS Linux 7.3.1-7013 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

.