CVE-2021-20016A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information.
Updated under an hour ago ()
Does this affect you?
It affects SonicWall SMA100 and 6 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by Nov 17, 2021, and it is known to be used in ransomware. Treat that date as your deadline.
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A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-89
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due Nov 17, 2021; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 40.04% (percentile 99)
- Assigned by
- sonicwall
- NVD analysis
- Analyzed
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
SonicWall SonicWall SMA100 sonicwall:sma100 (from the name) | SMA100 build version 10.x | CNA record |
sonicwall sma_100_firmware sonicwall:sma_100_firmware | from 10.0.0.0 before 10.2.0.5-d-29sv | NVD |
sonicwall sma_200_firmware sonicwall:sma_200_firmware | all versions | NVD |
sonicwall sma_210_firmware sonicwall:sma_210_firmware | all versions | NVD |
sonicwall sma_400_firmware sonicwall:sma_400_firmware | all versions | NVD |
sonicwall sma_410_firmware sonicwall:sma_410_firmware | all versions | NVD |
sonicwall sma_500v sonicwall:sma_500v | all versions | NVD |
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001x-refsource-confirm, mitigation, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20016us-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.