CVE-2020-7856

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-20 · updated 2026-06-17
Weakness: CWE-287

Description

A vulnerability of Helpcom could allow an unauthenticated attacker to execute arbitrary command. This vulnerability exists due to insufficient authentication validation.

Affected products

Cnesty Helpcom: before 11.2020 — fixed in 11.2020

How to fix

Upgrade to a fixed version: Cnesty Helpcom 11.2020. Check the vendor advisory for mitigations.

References

https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36003
https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36003

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