Improper HTTP Header Neutralization Vulnerability in SonicOS by SonicWall
CVE-2026-0516

6.5MEDIUM

Key Information:

Vendor

Sonicwall
Status
Sonicos
Vendor
CVE Published:
5 August 2026

What is CVE-2026-0516?

An improper neutralization of HTTP headers vulnerability in SonicOS could enable remote attackers to exploit the manipulation of the Host header. This flaw poses a significant risk by allowing attackers to redirect firewall management users to unauthorized web domains, potentially leading to phishing attacks or unauthorized access to sensitive information. Organizations using SonicOS are urged to review their firewall management configurations and apply appropriate security measures to mitigate this threat.

Affected Version(s)

SonicOS Linux 6.5.5.2-28n and older versions

SonicOS Linux 7.0.1-5169 and older versions

SonicOS Linux 7.3.3-7015 and older versions

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Joshua Chan
.