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CVE-2021-20016· NVD / CVE Program· CNA sonicwall

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
Feb 4, 2021
Updated
Aug 12, 2026
EPSS
40.0% · 99th percentile
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Action score

81

Now

Patch today or shut off access.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
12 / 30 · 40.0%

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 Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for government agencies: Nov 17, 2021.

Known to be used in ransomware campaigns.

Affected systems

VendorProduct
sonicwallsma 100 firmware
sonicwallsma 100
sonicwallsma 200 firmware
sonicwallsma 200
sonicwallsma 210 firmware
sonicwallsma 210
sonicwallsma 400 firmware
sonicwallsma 400
sonicwallsma 410 firmware
sonicwallsma 410
sonicwallsma 500v

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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 100 firmware10.0.0.0 and later · before 10.2.0.5-d-29sv
  • sonicwall sma 200 firmwareall versions
  • sonicwall sma 210 firmwareall versions
  • sonicwall sma 400 firmwareall versions
  • sonicwall sma 410 firmwareall versions
  • sonicwall sma 500vall versions

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 SMA100

    • SMA100 build version 10.xaffected

Other highest-scoring records for the same primary product.

  • CVE-2019-7481Vulnerability in SonicWall SMA100 allow unauthenticated user to gain read-only access to unauthorized resources.KEV
    90Now
  • CVE-2019-7483In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user to test for the preseKEV
    61This week
  • CVE-2019-7482Stack-based buffer overflow in SonicWall SMA100 allows an unauthenticated user to execute arbitrary code in function libSys.so.
    42Plan
  • CVE-2025-32819A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN user privileges to bypass the path traversal checks and delete
    37Monitor
  • CVE-2025-32820A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN user privileges can inject a path traversal sequence to make an
    36Monitor
  • CVE-2019-7486Code injection in SonicWall SMA100 allows an authenticated user to execute arbitrary code in viewcacert CGI script.
    35Monitor

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+272 d
  3. TodaySep 29, 2026+2064 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

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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