Wazuh fillData NULL pointer dereference causes analysisd crash

published 2025-10-29 12 mo ago modified 2026-10-19 20 d ago also EUVD-2025-36686

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

Wazuh is a free and open source platform used for threat prevention, detection, and response. fillData() implementation does not check whether value is NULL or not before calling os_strdup() on it. A compromised agent can cause a crash of analysisd by sending a specially crafted message to the wazuh manager. An attacker who is able to craft and send an agent message to the wazuh manager can cause analysisd to crash and make it unavailable. This vulnerability is fixed in 4.10.2.

Patch / fix

fixed in 1 links 1

wazuh wazuh 4.10.2

github.com/wazuh/wazuh@17f8dc2 commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 12 mo ago (2025-10-29)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/wazuh/wazuh/security/advisories/GHSA-mqpq-pcxc-8259 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

wazuh wazuh

Classification

Weakness

CWE-252 Unchecked Return Value
CWE-476 NULL Pointer Dereference

References

github.com /wazuh/wazuh/commit/17f8dc23a6211cbb398a262fcd1b0fe61b0a8eb6
patch
github.com /wazuh/wazuh/security/advisories/GHSA-mqpq-pcxc-8259
exploit, vendor-advisory

Sources

CVE List CVE-2025-62785
NVD CVE-2025-62785

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary