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VulnerabilityPublished

CVE-2026-0516: SonicWall SonicOS · Improper neutralization of HTTP headers for scripting syntax

Affects SonicWall SonicOSSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
SonicWallSonicOSAffected
  • 6.5.5.2-28n and older versions – 8.2.1-8010 and older versions
4 affected builds
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.

References

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