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CVE-2021-20028· NVD / CVE Program· CNA sonicwall

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

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

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
Aug 4, 2021
Updated
Jun 16, 2026
EPSS
30.1% · 98th percentile
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Action score

78

This week

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CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
9 / 30 · 30.1%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Mar 28, 2022. That signals real attacks, not theory.

Remediation deadline for government agencies: Apr 18, 2022.

Known to be used in ransomware campaigns.

Affected systems

VendorProduct
sonicwallsma 210 firmware
sonicwallsma 210
sonicwallsma 410 firmware
sonicwallsma 410
sonicwallsma 500v firmware
sonicwallsma 500v
sonicwallsra 4600 firmware
sonicwallsra 4600
sonicwallsra 1600 firmware
sonicwallsra 1600
sonicwallsra va firmware
sonicwallsra va

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • sonicwall sma 210 firmware8.0.0.0 and later · before 9.0.0.10-28sv
  • sonicwall sma 410 firmware8.0.0.0 and later · before 9.0.0.10-28sv
  • sonicwall sma 500v firmware8.0.0.0 and later · before 9.0.0.10-28sv

Versions reported by the vendor

Affected version ranges reported by the assigning authority (sonicwall). Independent of NVD's CPE analysis and usually ahead of it.

  • SonicWall SonicWall SRA/SMA100

    • 8.x firmware, 9.0.0.9-26sv and earlier.affected

Other highest-scoring records for the same primary product.

  • CVE-2025-40599An authenticated arbitrary file upload vulnerability exists in the SMA 100 series web management interface.
    40Plan
  • CVE-2022-1703Improper neutralization of special elements in the SonicWall SSL-VPN SMA100 series management interface allows a remote authenticated attack
    39Monitor
  • CVE-2025-40603A potential exposure of sensitive information in log files in SonicWall SMA100 Series appliances may allow a remote, authenticated administr
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+235 d
  3. TodaySep 29, 2026+1882 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

The query text is built by concatenating user input. The database cannot tell where the data ends and the command begins.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const owner = req.query.owner;const rows = await db.query(  "SELECT * FROM files WHERE owner = '" + owner + "'");

Fixed

ts
const owner = req.query.owner;const rows = await db.query(  "SELECT * FROM files WHERE owner = $1",  [owner]);

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

All records