CVE-2026-0516 Open redirect in SonicOS
Remote attackers can manipulate Host headers to redirect SonicOS firewall management users to arbitrary domains, potentially facilitating phishing or credential theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0516?
CVE-2026-0516 is a medium-severity vulnerability in SonicWall SonicOS, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-644
Which versions are affected by CVE-2026-0516?
How do I fix CVE-2026-0516?
No fix has been published for CVE-2026-0516 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-0516 being exploited?
There is no known exploitation of CVE-2026-0516 in the wild and no public exploit code.
Sources
Also known as GHSA-43cm-mrxj-qjr8.