CVE-2026-0516: SonicWall SonicOS · Improper neutralization of HTTP headers for scripting syntax
Affects SonicWall SonicOSSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 2 Nov 2026, 22:58 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 5 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| SonicWallSonicOS | Affected
| Fixed in– |
AI-suggested
Until an official fix is released, users should exercise caution when accessing the firewall management interface and monitor for updates from SonicWall.
Description
CVE-2026-0516 is a medium severity vulnerability in SonicWall SonicOS involving improper neutralization of HTTP headers. This flaw allows a remote attacker to manipulate the Host header, potentially redirecting firewall management users to arbitrary web domains. No specific affected versions or patches have been disclosed yet.