CVE-2021-40643Network attack vector

Root command execution via sendmail path injection

Published Jun 30, 2022 · Updated Aug 4, 2024

OS command injection in EyesOfNetwork before 07-07-2021 allows remote attackers to execute arbitrary commands as root through the web interface. The Cacti mail-options handler passes the configurable sendmail application path to a shell when it sends a test message without neutralizing command syntax. No authentication or prior instance knowledge is required, and a crafted path executed by Send Test Mail grants a root shell.

CVSS severity9.8
Critical
EPSS probability2.89%
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 EyesOfNetwork before 07-07-2021 allows remote attackers to execute arbitrary commands as root through the web interface. The Cacti mail-options handler passes the configurable sendmail application path to a shell when it sends a test message without neutralizing command syntax. No authentication or prior instance knowledge is required, and a crafted path executed by Send Test Mail grants a root shell.

The record

CVE
CVE-2021-40643
Published
Jun 30, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2022CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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