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Fencer Vulns
critical 9.8

CVE-2021-20028 kev+ ransomware in the critical feed json

Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products,…

published 2021-08-04 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7491

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-03-28, used in ransomware
epss
30.1%
EPSS 30.1% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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

Patch / fix

cisa required action The impacted product is end-of-life and should be disconnected if still in use.

  • sonicwall sma_210_firmware 9.0.0.10-28sv
  • sonicwall sma_410_firmware 9.0.0.10-28sv
  • sonicwall sma_500v_firmware 9.0.0.10-28sv
  • sonicwall sra_4600_firmware 9.0.0.10-28sv
  • sonicwall sra_1600_firmware 9.0.0.10-28sv
  • sonicwall sra_va_firmware 9.0.0.10-28sv

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-04-18 (4 y ago)
Ransomware
Known to be used in ransomware campaigns
Required action
The impacted product is end-of-life and should be disconnected if still in use.
Vendor, product
SonicWall, Secure Remote Access (SRA)
CISA name
SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

30.08% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • SonicWall SonicWall SRA/SMA100

Classification

Weakness
  • CWE-89 Improper Neutralization of Special Elements used in an SQL Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.