Vulnerability in Sonicwall Sonicos

CVE-2026-0516

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.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

  • Sonicwall Sonicos — versions 7.3.3-7015 and older versions, 6.5.5.1-6n and older versions, 8.2.1-8010 and older versions

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-0516?
CVE-2026-0516 is a medium-severity vulnerability in Sonicwall Sonicos, classified under Improper Neutralization of HTTP Headers for Scripting Syntax. CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-0516?
Medium severity. CVSS v3 base score is 6.5 out of 10.