CVE-2021-20035Improper 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.
Updated under an hour ago ()
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It affects SonicWall SMA100 and 5 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Apr 16, 2025; federal agencies had to remediate by May 7, 2025. Treat that date as your deadline.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-78
- Known exploited
- Added to CISA KEV Apr 16, 2025; federal remediation due May 7, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 4.18% (percentile 91)
- Assigned by
- sonicwall
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
SonicWall SMA100 sonicwall:sma100 (from the name) | 9.0.0.10-28sv and earlier; 10.2.0.7-34sv and earlier; 10.2.1.0-17sv and earlier | CNA record |
sonicwall sma_200_firmware sonicwall:sma_200_firmware | before 9.0.0.11-31sv; from 10.2.0.0 before 10.2.0.8-37sv; from 10.2.1.0 before 10.2.1.1-19sv | NVD |
sonicwall sma_210_firmware sonicwall:sma_210_firmware | before 9.0.0.11-31sv; from 10.2.0.0 before 10.2.0.8-37sv; from 10.2.1.0 before 10.2.1.1-19sv | NVD |
sonicwall sma_400_firmware sonicwall:sma_400_firmware | before 9.0.0.11-31sv; from 10.2.0.0 before 10.2.0.8-37sv; from 10.2.1.0 before 10.2.1.1-19sv | NVD |
sonicwall sma_410_firmware sonicwall:sma_410_firmware | before 9.0.0.11-31sv; from 10.2.0.0 before 10.2.0.8-37sv; from 10.2.1.0 before 10.2.1.1-19sv | NVD |
sonicwall sma_500v sonicwall:sma_500v | before 9.0.0.11-31sv; from 10.2.0.0 before 10.2.0.8-37sv; from 10.2.1.0 before 10.2.1.1-19sv | NVD |
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022x-refsource-confirm, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20035us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.