CVE & CISA-KEV Catalog

CVE-2021-20049

HIGH
7.5
CVSS v3
NVD

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.

CWE-204CWE-203

How to fix

Remediation Available
sma 100 firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD
sma 200 firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD
sma 210 firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD
sma 400 firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD
sma 410 firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD
sma 500v firmwareNVD
Affected:< 10.0.0.0Fixed in:10.0.0.0CVE-2021-20049derived from NVD

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
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

Exploit Intelligence

1.35%probability of exploitation in 30 days
69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Related Vulnerabilities

Other CWE-204 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2022-41697Medium5.320%--
CVE-2016-9499Medium5.37.8%-Fix
CVE-2019-19030Medium5.31.9%-Fix
CVE-2022-0564Medium5.31.4%-Fix
CVE-2021-39189Medium5.31.3%-Fix
CVE-2020-11063Low3.71.2%--

Common questions

How do I fix CVE-2021-20049?

Published advisories record a fix for 6 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2021-20049 being actively exploited?

Not that we know of. CVE-2021-20049 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 69% of all scored CVEs.

How severe is CVE-2021-20049?

CVE-2021-20049 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-20049 affect?

Published advisories record a fix for sma 100 firmware (NVD), sma 200 firmware (NVD), sma 210 firmware (NVD), sma 400 firmware (NVD), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.