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CVE-2021-20038: SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability

criticalknown exploitedpublic exploitCVE-2021-20038
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution.

CSIRTS triage

vendor: SonicWallproduct: SMA 100 AppliancesOther
What
SonicWall SMA 100 devices are vulnerable to an unauthenticated stack-based buffer overflow vulnerability.
Who is affected
Deployments of SonicWall SMA 100 Appliances.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest firmware from SonicWall.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-01-28
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-20038

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-20038coverage & exploitation statusNVD · CVE.org

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