CVE-2021-20041
HIGH
7.5
CVSS Score
Published: December 8, 2021 at 09:55 AM UTC
Updated: June 17, 2026 at 03:33 AM UTC
11 products affected across 1 vendorSMA 410 FirmwareSMA 210 FirmwareSMA 500V Firmware
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Severity
HIGH7.5
Exploit prediction
EPSS 21%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
sonicwall-sma-200 (same device)
sonicwall-sma-210 (same device)
sonicwall-sma-400 (same device)
sonicwall-sma-410 (same device)
sonicwall-sma-500v (same device)
v ≤ 10.2.0.8-37svv ≤ 10.2.1.1-19svv ≤ 10.2.1.2-24svv ≤ 9.0.0.11-31sv
Sma 200· SonicWalldevice
80%All versions
Sma 210· SonicWalldevice
80%All versions
Sma 400· SonicWalldevice
80%All versions
Sma 410· SonicWalldevice
80%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-835
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