CVE-2021-20034
CRITICAL
9.1
CVSS Score
Published: September 27, 2021 at 05:20 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
10 products affected across 1 vendorSMA 210 FirmwareSMA 410 FirmwareSMA 400 Firmware
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Severity
CRITICAL9.1
Exploit prediction
EPSS 82%
Description
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 9.0.0.10-28sv10.2.0.0 ≤ v ≤ 10.2.0.7-34sv10.2.1.0 ≤ v ≤ 10.2.1.0-17sv
sonicwall-sma-200 (same device)
v ≤ 9.0.0.10-28sv10.2.0.0 ≤ v ≤ 10.2.0.7-34sv10.2.1.0 ≤ v ≤ 10.2.1.0-17sv
sonicwall-sma-210 (same device)
v ≤ 9.0.0.10-28sv10.2.0.0 ≤ v ≤ 10.2.0.7-34sv10.2.1.0 ≤ v ≤ 10.2.1.0-17sv
sonicwall-sma-400 (same device)
v ≤ 9.0.0.10-28sv10.2.0.0 ≤ v ≤ 10.2.0.7-34sv10.2.1.0 ≤ v ≤ 10.2.1.0-17sv
sonicwall-sma-410 (same device)
v ≤ 9.0.0.10-28sv10.2.0.0 ≤ v ≤ 10.2.0.7-34sv10.2.1.0 ≤ v ≤ 10.2.1.0-17sv
v ≤ 10.2.0.7-34svv ≤ 10.2.1.0-17svv ≤ 9.0.0.10-28sv
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 (2)
x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.htmlx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-284CWE-22
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