ACTIVELY EXPLOITED
CVE-2021-27852: Checkbox Survey Deserialization of Untrusted Data Vulnerability
| Vendor | Checkbox |
|---|---|
| Product | Checkbox Survey |
| Actively exploited | Yes |
| Added to CISA KEV | 11 Apr 2022 |
| CISA federal deadline | 2 May 2022 |
| Weakness (CWE) | CWE-502 |
Required action (CISA's text)
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.
Description (NVD)
Deserialization of Untrusted Data vulnerability in CheckboxWeb.dll of Checkbox Survey allows an unauthenticated remote attacker to execute arbitrary code.
SOURCES
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.