This vulnerability can be exploited by parsing maliciously crafted project files with Horner Automation Cscape EnvisionRV v4.50.3.1 and prior. The issues result from the lack of proper validation of user-supplied data, which can result in reads and writes past the end of allocated data structures. User interaction is required to exploit this vulnerability as an attacker must trick a valid user to open a malicious HMI project file.
Published 2022-03-25 19:15:09
Updated 2022-04-04 15:38:59
Source ICS-CERT
View at NVD,   CVE.org
Vulnerability category: Input validation

Exploit prediction scoring system (EPSS) score for CVE-2021-44462

0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-44462

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
1.8
5.9
ICS-CERT
7.1
HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
1.8
5.2
NIST

CWE ids for CVE-2021-44462

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by:
    • ics-cert@hq.dhs.gov (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2021-44462

Products affected by CVE-2021-44462

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