CVE-2021-35504Public exploitNetwork attack vector

Administrator code execution via ffmpeg path injection

Published Oct 5, 2021 · Updated Jul 4, 2026

OS command injection in Afian FileRun 2021.03.26 and earlier allows remote authenticated users to execute code through the ffmpeg path setting. The checkFFmpeg action passes the administrator-supplied path to a shell command without neutralizing metacharacters, so pipes and command substitutions execute attacker input. Access to the administrative backend is required, and injected commands run with the privileges of the web server user.

CVSS severity7.2
High
EPSS probability3.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Afian FileRun 2021.03.26 and earlier allows remote authenticated users to execute code through the ffmpeg path setting. The checkFFmpeg action passes the administrator-supplied path to a shell command without neutralizing metacharacters, so pipes and command substitutions execute attacker input. Access to the administrative backend is required, and injected commands run with the privileges of the web server user.

The record

CVE
CVE-2021-35504
Published
Oct 5, 2021
Updated
Jul 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

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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