CVE-2021-20016
Summary
| CVE | CVE-2021-20016 |
|---|---|
| State | PUBLISHED |
| Assigner | sonicwall |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-02-04 06:15:13 UTC |
| Updated | 2026-08-12 05:17:33 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.369520000 probability, percentile 0.983950000 (date 2026-08-21)
CISA KEV: Listed on 2021-11-03; due 2021-11-17; ransomware use Known
Problem Types: CWE-89 | CWE-89 CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | ADP | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:L/Au:N/C:P/I:P/A:P
CISA Known Exploited Vulnerability
| Vendor | SonicWall |
|---|---|
| Product | SSLVPN SMA100 |
| Name | SonicWall SSLVPN SMA100 SQL Injection Vulnerability |
| Required Action | Apply updates per vendor instructions. |
| Notes | https://nvd.nist.gov/vuln/detail/CVE-2021-20016 |
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Sonicwall | Sma 100 | - | All | All | All |
| Operating System | Sonicwall | Sma 100 Firmware | All | All | All | All |
| Hardware | Sonicwall | Sma 200 | - | All | All | All |
| Operating System | Sonicwall | Sma 200 Firmware | - | All | All | All |
| Hardware | Sonicwall | Sma 210 | - | All | All | All |
| Operating System | Sonicwall | Sma 210 Firmware | - | All | All | All |
| Hardware | Sonicwall | Sma 400 | - | All | All | All |
| Operating System | Sonicwall | Sma 400 Firmware | - | All | All | All |
| Hardware | Sonicwall | Sma 410 | - | All | All | All |
| Operating System | Sonicwall | Sma 410 Firmware | - | All | All | All |
| Application | Sonicwall | Sma 500v | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | SonicWall | SonicWall SMA100 | affected SMA100 build version 10.x | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.cisa.gov/known-exploited-vulnerabilities-catalog | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.cisa.gov | US Government Resource |
| Security Advisory | af854a3a-2127-422b-91ae-364da2661108 | psirt.global.sonicwall.com | Mitigation, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2021-11-03T00:00:00.000Z | CVE-2021-20016 added to CISA KEV |
There are currently no legacy QID mappings associated with this CVE.