CVE-2020-7878Network attack vector

Unauthenticated code execution via unchecked downloads

Published Dec 28, 2021 · Updated Sep 16, 2024

Missing integrity verification in 4NB Corp. VideoOffice X2.9 and earlier allows remote attackers to download and execute arbitrary files. The product's download-and-execution path accepts retrieved content without an integrity check, but public advisories do not identify the responsible function or protocol. No authentication or user interaction is required, and successful exploitation executes attacker-supplied content on the Windows host.

CVSS severity9.8
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing integrity verification in 4NB Corp. VideoOffice X2.9 and earlier allows remote attackers to download and execute arbitrary files. The product's download-and-execution path accepts retrieved content without an integrity check, but public advisories do not identify the responsible function or protocol. No authentication or user interaction is required, and successful exploitation executes attacker-supplied content on the Windows host.

The record

CVE
CVE-2020-7878
Published
Dec 28, 2021
Updated
Sep 16, 2024
Vendor
4NB Corp.
Product
VideoOffice
Classifications
CWE-345, CWE-353, T1105
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=X2.9 <X2.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

4NB Corp. · VideoOfficeversion=X2.9 <X2.10

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
CWE-353Missing Support for Integrity Check
T1105Ingress Tool Transfer

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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