Critical severity9.8CISA KEVNVD Advisory· Published May 27, 2021· Updated Jun 17, 2026

CVE-2021-27852

Description

Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code. This issue affects: Checkbox Survey versions prior to 7.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Checkbox/Survey
cpe:2.3:a:checkbox:survey:*:*:*:*:*:*:*:*
Range: <7.0
Checkbox/Checkbox Surveyllm-create
Range: <7
Checkbox/Surveyv5
Range: unspecified

Patches

Vulnerability mechanics

References

www.kb.cert.org/vuls/id/706695nvdThird Party AdvisoryUS Government Resource
www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource

News mentions

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cvss	0.637
epss	0.026
exploit	0.000
kev	0.120
patch	0.000
ransomware	0.000