CVE-2026-33754: Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exh

mediumCVSS 6.5CVE-2026-33754

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length. The length is trusted before authentication/decryption and used directly to allocate memory, allowing unauthenticated denial of service of the cluster service. This issue has been fixed in version 4.14.5.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.5
Published: 2026-07-17
Last updated: 2026-07-20
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-33754

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-337540.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-33754	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Wazuh: Multiple vulnerabilitiescert-bund

Recent advisories for Wazuh is a

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-67308: Wazuh workflows before 44bf114 contain a shell injection vulnerability in GitHub Actions that …nvd · 2026-08-01
mediumCVE-2026-67307: Wazuh 5.0.0-beta1 (fixed in 5.0.0-beta3) does not validate or override the cluster_name and cl…nvd · 2026-08-01
high[NEW] [high] Wazuh: Multiple vulnerabilitiescert-bund · 2026-07-21
highCVE-2026-28220: Wazuh is a free and open source platform used for threat prevention, detection, and response. …nvd · 2026-07-20
mediumCVE-2026-44251: Wazuh is a free and open source platform used for threat prevention, detection, and response. …nvd · 2026-07-17
mediumCVE-2026-40106: Wazuh is a free and open source platform used for threat prevention, detection, and response. …nvd · 2026-07-17