Read the docs
TI-2026-71743 Aliases CVE-2026-74040

Arbitrary file overwrite in Wazuh manager enables root code execution

Priority HIGH 76CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite flaw in MasterHandler.process_files_from_worker that lets a cluster worker overwrite protected master files. An attacker who controls a worker can overwrite ossec.conf and agent.conf by using a trailing-slash basename bypass and missing extra_valid enforcement. This gives root remote code execution across the manager and every agent, and the CVSS 4.0 vector requires high privileges on the worker.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite vulnerability in MasterHandler.process_files_from_worker allowing a cluster worker to overwrite protected master files. Attackers controlling a worker can use a trailing-slash basename bypass and missing extra_valid enforcement to overwrite ossec.conf and agent.conf, achieving root remote code execution across the manager and every agent.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00716 54th percentileScored 2026-11-07
Fix Fixed wazuh-manager (Wazuh): 4.14.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Wazuhwazuh-manager3.9.0 to before 4.14.84.14.8Patch availableCNA
  • wazuh-manager VendorWazuh Affected 3.9.0 to before 4.14.8 Fixed in 4.14.8 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*——Wazuh
  • cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:* Versions — — ·Wazuh

Remediation

Upgrade wazuh-manager to version 4.14.8 or later, which is the first fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

  • Fix · CNA wazuh-manager (Wazuh) Fixed in 4.14.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    wazuh-manager 4.14.8

    13 records Highest priority Priority HIGH 5 HIGH, 6 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-71739 Missing origin check in Wazuh manager allows arbitrary file readPriority HIGH 77
    • TI-2026-71742 Session invalidation bypass in Wazuh manager token checkPriority HIGH 72
    • TI-2026-71738 Path traversal in Wazuh CDB list handlers lets workers delete filesPriority HIGH 72
    Show all 13 records →

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-74040
  2. 2026-10-18 CISA SSVC decision points changed
  3. 2026-10-18 Priority changed: MEDIUM → HIGH
  4. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 1

  • TI-2025-17783 Remote code execution in Wazuh server KEVCVSS 3.1CRITICAL 9.9
  • TI-2026-47604 Wazuh GitHub Actions Shell Injection via Fork Pull Request CVSS 4.0CRITICAL 9.3
  • TI-2026-71739 Missing origin check in Wazuh manager allows arbitrary file read CVSS 4.0HIGH 8.7
  • TI-2026-23722 Path traversal in wazuh CVSS 3.1CRITICAL 9.9
  • TI-2024-01157 Remote code execution and local privilege escalation in Wazuh Windows agent via NetNTLMv2 hash theft CVSS 4.0CRITICAL 9.5
  • TI-2026-22556 Wazuh: Pre-auth stack-based buffer overflow in wazuh-remoted print_hex_string() due to signed char promotion on x86_64 CVSS 3.1HIGH 8.2
See all 101 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences