CRITICAL CISA KEV

CVE-2021-27852

CVSS v3

9.8

CRITICAL

EPSS Score

25.5%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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.

CISA Known Exploited Vulnerability

Date Added
4/11/2022
Patch Due Date
5/2/2022
Ransomware Use
Unknown

Technical details

Published
5/27/2021

Frequently asked questions

What is CVE-2021-27852?

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.

Is CVE-2021-27852 actively exploited?

Yes. CVE-2021-27852 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 5/2/2022.

What is the CVSS score for CVE-2021-27852?

CVE-2021-27852 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2021-27852 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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