[UPDATE] [medium] Zabbix: Multiple Vulnerabilities

mediumCVE-2026-45133 CVE-2026-45304 CVE-2026-45305 CVE-2026-32313

An attacker can exploit multiple vulnerabilities in Zabbix to conduct a denial of service attack and to bypass security measures.

CSIRTS triage

vendor: Zabbix product: Zabbix Denial of service Authentication bypass

What: Multiple vulnerabilities allow an attacker to conduct a denial of service attack and bypass security measures.
Who is affected: Deployments of Zabbix are affected.
Urgency: Remediation is medium urgency due to the potential for denial of service.
Action: Update Zabbix to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-15
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1805

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-2026-451330.74% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all scored CVEs.
Low exploitation riskCVE-2026-453040.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all scored CVEs.
Low exploitation riskCVE-2026-453050.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all scored CVEs.
Low exploitation riskCVE-2026-323130.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-45133	coverage & exploitation status	NVD · CVE.org
CVE-2026-45304	coverage & exploitation status	NVD · CVE.org
CVE-2026-45305	coverage & exploitation status	NVD · CVE.org
CVE-2026-32313	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Zabbix

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.

high[NEW] [UNPATCHED] [critical] Zabbix: Vulnerability allows cross-site scriptingcert-bund · 2026-07-28
criticalexploitedCVE-2022-23131: Zabbix Frontend Authentication Bypass Vulnerabilitycisa-kev · 2022-02-22
criticalexploitedCVE-2022-23134: Zabbix Frontend Improper Access Control Vulnerabilitycisa-kev · 2022-02-22