CVE-2021-20028

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National Vulnerability Database Information

Description: Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products, specifically the SRA appliances running all 8.x firmware and 9.0.0.9-26sv or earlier

CVSS Base Score: 9.8 (v3.1)

The CVSS Base Score is a score from 0 to 10 that represents the intrinsic severity of a vulnerability. A higher score indicates greater severity.

Value

0.02.55.07.510.0

Published on: 08/04/2021 19:15:08
Last modified: 06/17/2026 03:33:10
NIST: CVE source from the National Vulnerability Database (NVD)

CVSS Metrics Details

Base Severity: CRITICAL
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: HIGH

Common Weakness Enumeration (CWE)

Database CWE: v4.18

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') ↗

The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

Fonte: MITRE CWE

FIRST Information

EPSS Score: 0.3008

The EPSS (Exploit Prediction Scoring System) is a score from 0 to 1 that indicates the probability that a vulnerability will be exploited in the real world in the next 30 days. A higher value indicates a greater likelihood of exploitation.

Value

0.00.250.50.751.0

Percentile: 0.9800

The Percentile indicates how much higher this vulnerability's EPSS score is compared to all other vulnerabilities in the EPSS database. For example, a percentile of 0.90 (90%) means that 90% of vulnerabilities have an EPSS score equal to or lower than the current one.

Value

0.00.250.50.751.0

*Data updated as of: 2026-07-10

CISA Information (Known Exploited Vulnerabilities)

The CISA KEV Catalog lists vulnerabilities that have been actively exploited in the real world. If a CVE is present in this catalog, it indicates that the threat is immediate and mitigation should be a top priority.

CVE CVE-2021-20028 IS PRESENT in the CISA KEV Catalog!

Vulnerability Name: SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability
Short Description: SonicWall Secure Remote Access (SRA) products contain an improper neutralization of a SQL Command leading to SQL injection.
Date Added to KEV: 03/28/2022
Vendor/Product: SonicWall / Secure Remote Access (SRA)
Required Action: The impacted product is end-of-life and should be disconnected if still in use.
Due Date: 04/18/2022

Articles published on Red Hot Cyber

I dispositivi di SonicWall vengono attaccati da malware che sopravvive anche dopo il riavvio

NVD References

Exploit PoC from GitHub

No results found on GitHub for this CVE.