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CVE-2026-25772— Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Integer Underflow

Quick assessment

Affected
wazuh wazuh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wazuh是Wazuh开源的一个应用软件。用于收集，汇总，索引和分析安全数据，帮助组织检测入侵，威胁和行为异常。 Wazuh 4.4.0至4.14.3之前版本存在数字错误漏洞，该漏洞源于数据库同步模块存在整数下溢，可能导致栈缓冲区溢出，引发拒绝服务或潜在远程代码执行。

CVSS 4.9 · Medium EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-25772

Vulnerability Information
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Vulnerability Title
Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Integer Underflow
Source: CVE Program / CVE List V5
Vulnerability Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.14.3, a stack-based buffer overflow vulnerability exists in the Wazuh Database synchronization module (`wdb_delta_event.c`). The SQL query construction logic allows for an integer underflow when calculating the remaining buffer size. This occurs because the code incorrectly aggregates the return value of `snprintf`. If a specific database synchronization payload exceeds the size of the query buffer (2048 bytes), the size calculation wraps around to a massive integer, effectively removing bounds checking for subsequent writes. This allows an attacker to corrupt the stack, leading to a Denial of Service (DoS) or potentially RCE. Version 4.14.3 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Wazuh 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wazuh是Wazuh开源的一个应用软件。用于收集，汇总，索引和分析安全数据，帮助组织检测入侵，威胁和行为异常。 Wazuh 4.4.0至4.14.3之前版本存在数字错误漏洞，该漏洞源于数据库同步模块存在整数下溢，可能导致栈缓冲区溢出，引发拒绝服务或潜在远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wazuh wazuh >= 4.4.0, < 4.14.3 -

II. Public POCs for CVE-2026-25772

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III. Intelligence Information for CVE-2026-25772

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Vendor Advisories for CVE-2026-25772 (1)

Same Patch Batch · wazuh · 2026-03-17 · 5 CVEs total

CVE-2026-25769 9.1 CRITICAL Wazuh Cluster vulnerable to Remote Code Execution via Insecure Deserialization
CVE-2026-25770 9.1 CRITICAL Wazuh has Privilege Escalation to Root via Cluster Protocol File Write
CVE-2026-25771 5.3 MEDIUM Wazuh Vulnerable to Denial of Service via Synchronous I/O Blocking in Asynchronous Authent
CVE-2026-25790 4.9 MEDIUM Wazuh has Stack-Based Buffer Overflow in Security Configuration Assessment JSON Parser

IV. Related Vulnerabilities

Same product: wazuh
Same vendor: wazuh
Same weakness: CWE-121

V. Comments for CVE-2026-25772

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