HIGH
CVE-2021-20049
CWE-204Published: December 23, 2021· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2021-20049 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
sonicwall12 product(s)
sma 100 firmwaresma100sma 200 firmwaresma200sma 210 firmwaresma210sma 400 firmwaresma400sma 410 firmwaresma410sma 500v firmwaresma500v
Source: NVD CPE · 24 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (2)
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Quick Facts
CVE IDCVE-2021-20049
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-204
CISA KEVNo
Affected1 vendor(s)
PublishedDec 23, 2021
Related CVEs (CWE-204)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-20049 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.