SonicOS firewalls
CVE-2026-0516: Improper neutralization of HTTP Headers for Scripting Syntax in SonicOS
A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 6.5
EPSS0.34%Chance of exploitation in 30 days
Public exploitNot tracked
FixSee advisory
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| SonicOS (Linux) 6.5 | See the advisory |
| SonicOS (Linux) 7.0 | See the advisory |
| SonicOS (Linux) 7.3 | See the advisory |
| SonicOS (Linux) 8.2 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.