Vulnerability in SonicWall Sma 200
CVE-2021-20041
An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfiles/sonicfiles resulting in a loop with unreachable exit condition. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.066 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.068 · newest: 0.066 · change: -0.002
Affected products
- SonicWall Sma 200
- SonicWall Sma 200 Firmware — versions 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 210
- SonicWall Sma 210 Firmware — versions 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 400
- SonicWall Sma 400 Firmware — versions 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 410
- SonicWall Sma 410 Firmware — versions 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
- SonicWall Sma 500v
- SonicWall Sma 500v Firmware — versions 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
Weakness classification (CWE)
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20041?
- CVE-2021-20041 is a high-severity vulnerability in SonicWall Sma 200, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2021-12-08.
- How severe is CVE-2021-20041?
- High severity. CVSS v3 base score is 7.5 out of 10.