CVE-2026-40079Network attack vector

Authenticated command execution via unescaped graph text

Published Jun 24, 2026 · Updated Jun 24, 2026

Command injection in Cacti 1.2.30 and earlier allows remote authenticated users to execute OS commands through crafted graph templates. In lib/rrd.php, escape_command() returns its command unchanged, so __rrd_execute() sends graph-template text_format values and host substitutions to shell_exec() without adequate escaping. High-privileged Cacti access and graph-rendering reachability are required; successful exploitation runs commands with the Cacti process's operating-system privileges.

CVSS severity8.6
High
EPSS probability1.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Cacti 1.2.30 and earlier allows remote authenticated users to execute OS commands through crafted graph templates. In lib/rrd.php, escape_command() returns its command unchanged, so __rrd_execute() sends graph-template text_format values and host substitutions to shell_exec() without adequate escaping. High-privileged Cacti access and graph-rendering reachability are required; successful exploitation runs commands with the Cacti process's operating-system privileges.

The record

CVE
CVE-2026-40079
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Cacti Group
Product
Cacti
Classifications
CWE-88, CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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?

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

  1. Affected versionversion=< 1.2.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

The Cacti Group · Cactiversion=< 1.2.31

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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