CVE-2021-20028 (GCVE-0-2021-20028)
Vulnerability from cvelistv5 – Published: 2021-08-04 19:10 – Updated: 2025-10-21 23:25 Unsupported When AssignedSummary
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
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-04 14:52 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://psirt.global.sonicwall.com/vuln-detail/SN… | x_refsource_CONFIRM |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| SonicWall | SonicWall SRA/SMA100 |
Affected:
8.x firmware
Affected: 9.0.0.9-26sv and earlier. |
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: d18f860c-3f5a-423c-bb2e-0ccf0a338e81
Exploited: Yes
Timestamps
First Seen: 2022-03-28
Asserted: 2022-03-28
Scope
Notes: KEV entry: SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability | Affected: SonicWall / Secure Remote Access (SRA) | Description: SonicWall Secure Remote Access (SRA) products contain an improper neutralization of a SQL Command leading to SQL injection. | Required action: The impacted product is end-of-life and should be disconnected if still in use. | Due date: 2022-04-18 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-20028
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-89 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Secure Remote Access (SRA) |
| Due Date | 2022-04-18 |
| Date Added | 2022-03-28 |
| Vendorproject | SonicWall |
| Vulnerabilityname | SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-02-02 13:25 UTC
| Updated: 2026-02-06 07:53 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ccfea4ed-7e63-4d5a-99b7-4f4baabeacaa
Exploited: Yes
Characteristics
Severity:
98.0
Timestamps
First Seen: 2024-09-16
Asserted: 2024-09-16
Last Seen: 2026-09-06
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: SonicWall / SonicWall Secure Remote Access | Class: vpn | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-09-06: 21
Evidence
Type: Honeypot
Signal: In The Wild Attempts
Confidence: 70%
Source: shadowserver
Details
| 1D | 4 |
|---|---|
| Iot | no |
| Feed | Shadowserver Foundation honeypot/exploited-vulnerabilities |
| Type | http-scan |
| Class | vpn |
| 7D Avg | 3 |
| Vendor | SonicWall |
| 30D Avg | 1 |
| 90D Avg | 2 |
| Product | SonicWall Secure Remote Access |
| Cisa Kev | yes |
| Connections | 21 |
| Observation Date | 2026-09-06 |
| Vulnerability Class | CVSS |
| Vulnerability Score | 9.8 |
| Vulnerability Severity | Critical |
References
Created: 2026-07-01 05:54 UTC
| Updated: 2026-09-08 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: aa9dfa5f-434d-4857-a001-657ab0ce334a
Exploited: Yes
Timestamps
First Seen: 2022-03-28
Asserted: 2022-03-28
Scope
Notes: KEVIntel entry: Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products,... | Affected: SonicWall / SonicWall SRA/SMA100 | CVSS: 9.8 (CRITICAL) | EPSS: 0.30084 | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products,... |
| Vendor | SonicWall |
| Product | SonicWall SRA/SMA100 |
| Added Date | 2022-03-28T00:00:00.000Z |
| Cvss Score | 9.8 |
| Epss Score | 0.30084 |
| Cvss Severity | CRITICAL |
| Epss Percentile | 0.97974 |
| Used In Malware | yes |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
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"time": "2022-03-28T00:00:00.000Z",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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