vulnerability
SonicWall SonicOS: CVE-2021-20046: SonicOS Content-Length HTTP Header Stack Overflow Vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:L/Au:S/C:P/I:P/A:P) | Jan 5, 2022 | May 25, 2026 | May 25, 2026 |
Severity
7
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:P)
Published
Jan 5, 2022
Added
May 25, 2026
Modified
May 25, 2026
Description
A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 6 and Gen 7 firmware versions.
Solutions
sonicwall-sonicos-gen6-nsa-tz-soho-w-supermassive-92xx94xx96xx-upgrade-6549-92nsonicwall-sonicos-gen7-tz-upgrade-latestsonicwall-sonicos-gen7-nsa-upgrade-latestsonicwall-sonicos-gen7-nssp-upgrade-latestsonicwall-sonicos-gen7-nsv-upgrade-latest
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.