CVE-2025-62791CWE-252CWE-476

CVE-2025-62791

High · published October 29, 2025

CVSS v3.1
7.5
EPSS
0%
Percentile
25.6
In the wild
Unconfirmed
What it is

⚠️ A compromised agent can crash your Wazuh analysisd service with a specially crafted message — talk about a surprising party crasher! 🎉 Imagine a delivery driver bringing in a package but failing to read the delivery instructions properly — this can lead to a major pile-up in the warehouse! When DecodeCiscat() doesn’t check for errors, it’s like that driver ignoring crucial details, causing everything to come to a halt. If an attacker sends a specially crafted message, the analysisd service can crash and become unavailable, leaving your threat detection capabilities compromised. It’s not a complete breach, but it could lead to missed alerts and delays in response times, which is definitely not ideal for your security posture!

Put simply

Imagine a delivery driver bringing in a package but failing to read the delivery instructions properly — this can lead to a major pile-up in the warehouse! When DecodeCiscat() doesn’t check for errors, it’s like that driver ignoring crucial details, causing everything to come to a halt. This vulnerability arises from the DecodeCiscat() function failing to validate the return value of cJSON_GetObjectItem(), potentially leading to a NULL value and crashing the analysisd service when it attempts to process an error message from a compromised agent.

What to do

If an attacker sends a specially crafted message, the analysisd service can crash and become unavailable, leaving your threat detection capabilities compromised. It’s not a complete breach, but it could lead to missed alerts and delays in response times, which is definitely not ideal for your security posture! To mitigate this issue, upgrade to Wazuh version 4.11.0 or higher immediately. Additionally, it's important to audit your agent messaging configurations to ensure they are secure and validate any messages that come through. Don't let a party crasher disrupt your security! You've got this! By following these steps, you can keep your Wazuh system healthy and secure. 🛡️

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00335 · 25.6th percentile
Weaknesses
CWE-252 · Unchecked Return Value; CWE-476 · NULL Pointer Dereference
Published
2025-10-29T21:15Z
Affected products (1)
ProductVersionsFixed in
wazuh/wazuh< 4.11.04.11.0
References (1)
EPSS history
Timeline
  • 29 OCT 16:48Z
    Wazuh vulnerable to NULL pointer dereference in DecodeCiscat
    cvelistv5