CVE-2020-7869Network attack vector

Arbitrary code execution via Tight file CMD

Published Jun 29, 2021 · Updated Aug 4, 2024

Improper input validation in ZOOK 2.0.4.6 allows remote authenticated users to create and execute arbitrary files on an agent PC. The Viewer’s Tight file CMD accepts a traversal path without adequate validation, allowing attacker-controlled files to be written and launched by the Agent. Valid connection details are required; successful exploitation runs the file with the Agent process’s privileges.

CVSS severity8.8
High
EPSS probability1.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in ZOOK 2.0.4.6 allows remote authenticated users to create and execute arbitrary files on an agent PC. The Viewer’s Tight file CMD accepts a traversal path without adequate validation, allowing attacker-controlled files to be written and launched by the Agent. Valid connection details are required; successful exploitation runs the file with the Agent process’s privileges.

The record

CVE
CVE-2020-7869
Published
Jun 29, 2021
Updated
Aug 4, 2024
Vendor
Mastersoft Co., Ltd.
Product
ZOOK
Classifications
CWE-20, T1105, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.4.6 <=2.0.4.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mastersoft Co., Ltd. · ZOOKversion=2.0.4.6 <=2.0.4.6

Published CVSS scores

9.0KrCERT/CCCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1105Ingress Tool Transfer
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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