CVE-2021-20038
Is CVE-2021-20038 real, exploitable, or a false positive? Here's the community verdict.
signals
public sources
Confirmed exploited in the wild. Patch this first, regardless of the base score.
public exploits
links to sources — we don’t host codeUnverified proof-of-concept code has been published. It may or may not be functional — assess before relying on it.
baseline read
auto · not a community verdict
Real — exploited in the wild
CISA confirms active exploitation. Treat scanner hits as true positives unless your specific version or config is unaffected.
Based on CISA KEV
Confirm or dispute →CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.
References
Published
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In your experience, is this finding real and exploitable?
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Field notes & remediation
Verdicts are the quick signal. Notes are the evidence and fixes behind them.
- 0
SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability — SonicWall SMA 100 devies are vulnerable to an unauthenticated stack-based buffer overflow vulnerability where exploitation can result in code execution. Listed in the CISA KEV catalog (added 2022-01-28) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~100%. Treat it as real and prioritize remediation over triage.
- 0
Required action for SonicWall SMA 100 Appliances: Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-02-11. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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