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Background exploitation KEV catalog Ransomware No authentication
CVE-2021-20028

SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability

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

CheckOps priority index
7.8/10 Patch within 7 days
Severity9.8
Probability3.0
Exploitation5/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 30.1% higher than 98.2% of CVEs
CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:
Exploited for 1,681 days 28 Mar 2022
CISA due date 18 Apr 2022 for US federal agencies

Exploitation probability EPSS · FIRST

05010026 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

  • KEV catalog (CISA)28 Mar 2022
  • Exploited in EUVD (ENISA)28 Mar 2022
  • Used by ransomwareyes
  • EPSS above 10 %30.1%
  • No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: The impacted product is end-of-life and should be disconnected if still in use.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

SonicWall SRA/SMA100Secure Remote Access (SRA)
Affected versions
  • 9.0.0.9-26sv and earlier.
  • 8.x firmware
Weaknesses (CWE)
CWE-89

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 30.1%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2026-83549SonicWall SMA1000 Appliances OS Command Injection Vulnerability
    4.6 · Actively exploited
  • CVE-2026-83548SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
    6.0 · Actively exploited
  • CVE-2026-15410SonicWall SMA1000 Appliances Code Injection Vulnerability
    5.6 · Actively exploited
  • CVE-2026-15409SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
    6.6 · Actively exploited
  • CVE-2025-40602SonicWall SMA1000 Missing Authorization Vulnerability
    3.9 · Background exploitation
  • CVE-2023-44221SonicWall SMA100 Appliances OS Command Injection Vulnerability
    7.0 · Background exploitation

Are you affected?

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities