RCE in SonicWall Sma100
CVE-2021-20035
Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.042 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000
Affected products
- SonicWall Sma100 — versions 9.0.0.10-28sv and earlier, 10.2.0.7-34sv and earlier, 10.2.1.0-17sv and earlier
- SonicWall Sma 200
- SonicWall Sma 200 Firmware
- SonicWall Sma 210
- SonicWall Sma 210 Firmware
- SonicWall Sma 400
- SonicWall Sma 400 Firmware
- SonicWall Sma 410
- SonicWall Sma 410 Firmware
- SonicWall Sma 500v
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-20035?
- CVE-2021-20035 is a medium-severity vulnerability in SonicWall Sma100, classified under OS Command Injection. CVSS score: 6.5/10. Published 2021-09-27.
- How severe is CVE-2021-20035?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-20035 known to be exploited?
- Yes. CVE-2021-20035 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-04-16), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.