CVE-2021-27852 is a vulnerability in Checkbox Survey
Published on May 27, 2021
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.
Known Exploited Vulnerability
This Checkbox Survey Deserialization of Untrusted Data Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code.
The following remediation steps are recommended / required by May 2, 2022: Versions 6 and earlier for this product are end-of-life and must be removed from agency networks. Versions 7 and later are not considered vulnerable.
Vulnerability Analysis
CVE-2021-27852 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2021-27852 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2021-27852
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Affected Versions
Checkbox Survey:- Version unspecified and below 7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.