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NVD / CVE Program· CNA sonicwall

CVE-2021-20049: A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration base

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 72.5% of all records.
  • 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.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration based on the server responses. This vulnerability impacts 10.2.1.2-24sv, 10.2.0.8-37sv and earlier 10.x versions.

HighCVSS 7.5 · v3.1—No exploit No fix recorded
Published
Dec 22, 2021
Updated
Jun 16, 2026
EPSS
1.3% · 72th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-20049

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sonicwallsma 100 firmware
sonicwallsma100
sonicwallsma 200 firmware
sonicwallsma200
sonicwallsma 210 firmware
sonicwallsma210
sonicwallsma 400 firmware
sonicwallsma400
sonicwallsma 410 firmware
sonicwallsma410
sonicwallsma 500v firmware
sonicwallsma500v

Using sma 100 firmware? Add it to your stack and be the first to know about CVEs like this one. (VPN gateway)

Watch new CVEs for sma 100 firmware

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

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

  • sonicwall sma 100 firmwarebefore 10.0.0.0
  • sonicwall sma 100 firmware10.2.0.8-37sv
  • sonicwall sma 100 firmware10.2.1.2-24sv
  • sonicwall sma 200 firmwarebefore 10.0.0.0
  • sonicwall sma 200 firmware10.2.0.8-37sv
  • sonicwall sma 200 firmware10.2.1.2-24sv
  • sonicwall sma 210 firmwarebefore 10.0.0.0
  • sonicwall sma 210 firmware10.2.0.8-37sv
  • sonicwall sma 210 firmware10.2.1.2-24sv
  • sonicwall sma 400 firmwarebefore 10.0.0.0
  • sonicwall sma 400 firmware10.2.0.8-37sv
  • sonicwall sma 400 firmware10.2.1.2-24sv
  • sonicwall sma 410 firmwarebefore 10.0.0.0
  • sonicwall sma 410 firmware10.2.0.8-37sv
  • sonicwall sma 410 firmware10.2.1.2-24sv
  • sonicwall sma 500v firmwarebefore 10.0.0.0
  • sonicwall sma 500v firmware10.2.0.8-37sv
  • sonicwall sma 500v firmware10.2.1.2-24sv

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

    • 10.2.0.8-37sv and earlier, 10.2.1.2-24sv and earlieraffected

Same product

sonicwall: all records

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-2021-20016A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to accessKEV
    81Now
  • CVE-2019-7483In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user to test for the preseKEV
    61This week

Published before and after this one in the same product

  • ← EarlierCVE-2019-7486Dec 18, 2019 · Code injection in SonicWall SMA100 allows an authenticated user to execute arbitrary code in viewcacert CGI script.
    35Monitor
  • ← EarlierCVE-2020-5146Jan 8, 2021 · A vulnerability in SonicWall SMA100 appliance allow an authenticated management-user to perform OS command injection using HTTP POST paramet
    29Monitor
  • Later →CVE-2021-20050Dec 22, 2021 · An Improper Access Control Vulnerability in the SMA100 series leads to multiple restricted management APIs being accessible without a user l
    30Monitor

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

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

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.

Credits

All researchers

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
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-204 · Observable Response Discrepancy

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

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

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records