CVE-2026-49442 Cacti CVE debrief

Who should care

Cacti administrators and users should be aware of this vulnerability and take steps to upgrade to version 1.2.31 or later. Administrators should review their deployments and apply the patch to prevent exploitation. Security teams should monitor for potential enumeration attempts and implement additional security measures to prevent user enumeration attacks. Operators and platform administrators should also be aware of the vulnerability and its potential  

Why it matters

This user enumeration vulnerability in Cacti allows an attacker to identify valid usernames, potentially leading to targeted attacks. Cacti administrators should upgrade to version 1.2.31 or later to prevent exploitation.

• An attacker can use this vulnerability to identify valid usernames, potentially leading to targeted attacks
• The vulnerability allows for user enumeration, which can be used to gather information for further attacks
• The patched version 1.2.31 should be implemented to prevent exploitation

Technical summary

The Cacti application returns different error messages depending on whether a provided username exists in the system, allowing an attacker to identify valid usernames. The patched version 1.2.31 fixes this issue by standardizing error messages to prevent disclosure of username existence. This vulnerability can be used to gather information for further attacks. The technical details of the vulnerability involve the application's handling of login attempts and error messages. The patch addresses the root cause of the vulnerability.

Defensive priority

Medium priority for Cacti administrators to upgrade to version 1.2.31.

Recommended defensive actions

• Upgrade Cacti to version 1.2.31 or later
• Review login attempt logs for potential enumeration attempts
• Implement additional security measures to prevent user enumeration attacks
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability, its impact, and the patched version. The vulnerability is patched in version 1.2.31. Evidence from the CVE record and source item confirms the existence of the vulnerability and the effectiveness of the patch. Cacti administrators should verify their deployments and apply the patch. The CVE Program and NVD provide additional context and details on the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.