CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-20038
Critical (9.8) in SonicWall SMA 100 Appliances. In CISA KEV since 2022-01-28, with known ransomware use. EPSS 100% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 100% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CISA KEV
- listed 2022-01-28, due 2022-02-11, known ransomware use
- CWEs
- CWE-121, CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- sonicwall:sma_200_firmware
- sonicwall:sma_210_firmware
- sonicwall:sma_400_firmware
- sonicwall:sma_410_firmware
- sonicwall:sma_500v_firmware
References
- https://github.com/jbaines-r7/badblood
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
- https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed-2/
- https://github.com/jbaines-r7/badblood
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026