Vulnerability Report

CVE-2026-40084

Title: Cacti Path Traversal leading to Arbitrary File Read

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2026-40084.

CWE Category CWE-22

Published Date Jun 25, 2026

Modified Date Jun 29, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.39%

Vulnerability Summary

CVE-2026-40084: Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Path Traversal through the Report format_file Parameter, causing arbitrary file read. This vulnerability occurs in two stages. In the first stage (stored injection), lib/html_reports.php at line 283 stores $save['format_file'] = $post['format_file'] directly into the database without any validation. In the second stage (file read), lib/reports.php at line 667 concatenates CACTI_PATH_FORMATS . '/' . $format_file, and line 670 then calls file($format_file), reading arbitrary files from the filesystem. This issue has been fixed in version 1.2.31.

Impacted Vendors

the_cacti_group 1

cacti 1

Reference Links

https://github.com/Cacti/cacti/commit/4c09efaebf3a9faec66969d0b5c4aceaf397f37f https://github.com/Cacti/cacti/security/advisories/GHSA-mjvw-mhj5-9jcj

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-40084 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 29, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

June 25, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.