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ExploitedIn CISA KEVFix available

CVE-2021-20028

Exploitation confirmed. First attested on 2022-03-28 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2021-08-04
  • Fixed in9.0.0.10-28sv
  • WeaknessCWE-89

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC
  1. 2021-08-0419:15CVE publishedNVD
  2. 2022-03-28Added to the CISA KEV catalogCISA KEV
  3. 2022-03-28Listed as exploited by GCVEGCVE
  4. 2022-03-28Exploitation first reportedCISA KEV
  5. 2025-02-0414:52SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-20028?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-20028?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Sonicwall sma 210 firmwareversion to verify
BranchAffectedFixed in
9.0≥ 8.0.0.0, < 9.0.0.10-28sv9.0.0.10-28sv
Sonicwall sma 410 firmwareversion to verify
BranchAffectedFixed in
9.0≥ 8.0.0.0, < 9.0.0.10-28sv9.0.0.10-28sv
Sonicwall sma 500v firmwareversion to verify
BranchAffectedFixed in
9.0≥ 8.0.0.0, < 9.0.0.10-28sv9.0.0.10-28sv

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As sonicwall, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • SonicWall SRA/SMA100
    Affected
    • = 8.x firmwareno fix stated
    • = 9.0.0.9-26sv and earlier.no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2021-08-04

Fix

  1. Update Sonicwall sma 210 firmware to 9.0.0.10-28sv
  2. CISA’s required action: The impacted product is end-of-life and should be disconnected if still in use.due 2022-04-18

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-03-28
Patch Due Date
2022-04-18
Ransomware Use
Known
Required Action
The impacted product is end-of-life and should be disconnected if still in use.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-08-04
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-2gf8-x72h-g57r

Frequently asked questions

What is CVE-2021-20028?

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

Is CVE-2021-20028 actively exploited?

Yes. CVE-2021-20028 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-04-18.

What is the CVSS score for CVE-2021-20028?

CVE-2021-20028 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record