VULNERABILITY INTELLIGENCE
CVE-2021-20038
CVSS score9.8 CRITICAL
EPSS probability99.91%
CISA KEVKnown exploited vulnerability
Published2021-12-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability
Vendor / product: SonicWall / SMA 100 Appliances
Description
A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.
Weakness classification
- PSIRT@sonicwall.com: CWE-121
- nvd@nist.gov: CWE-787
Primary references
- PSIRT@sonicwall.com — Exploit, Third Party Advisory
- PSIRT@sonicwall.com — Vendor Advisory
- PSIRT@sonicwall.com — Exploit, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 — US Government Resource