Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-25790— Wazuh has Stack-Based Buffer Overflow in Security Configuration Assessment JSON Parser

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 3.9.0至4.14.3之前版本存在缓冲区错误漏洞，该漏洞源于安全配置评估解码器存在多个栈缓冲区溢出，可能导致拒绝服务或潜在远程代码执行。

CVSS 4.9 · Medium EPSS 0.60% · P48
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-25790

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Wazuh has Stack-Based Buffer Overflow in Security Configuration Assessment JSON Parser
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 3.9.0 and prior to version 4.14.3, multiple stack-based buffer overflows exist in the Security Configuration Assessment (SCA) decoder (`wazuh-analysisd`). The use of `sprintf` with a floating-point (`%lf`) format specifier on a fixed-size 128-byte buffer allows a remote attacker to overflow the stack. A specially crafted JSON event can trigger this overflow, leading to a denial of service (crash) or potential RCE on the Wazuh manager. The vulnerability is located in `/src/analysisd/decoders/security_configuration_assessment.c`, within the `FillScanInfo` and `FillCheckEventInfo` functions. In multiple locations, a 128-byte buffer (`char value[OS_SIZE_128];`) is allocated on the stack to hold the string representation of a number from a JSON event. The code checks if the number is an integer or a double. If it's a double, it uses `sprintf(value, "%lf", ...)` to perform the conversion. This `sprintf` call is unbounded. If a floating-point number with a large exponent (e.g., `1.0e150`) is provided, `sprintf` will attempt to write its full string representation (a "1" followed by 150 zeros), which is larger than the 128-byte buffer, corrupting the stack. Version 4.14.3 patches 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 缓冲区错误漏洞
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 3.9.0至4.14.3之前版本存在缓冲区错误漏洞，该漏洞源于安全配置评估解码器存在多个栈缓冲区溢出，可能导致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 >= 3.9.0, < 4.14.3 -

II. Public POCs for CVE-2026-25790

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-25790

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-25790 (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-2026-25772 4.9 MEDIUM Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Inte

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-25790

No comments yet

Leave a comment