CVE-2026-28421
An attacker can exploit multiple vulnerabilities in IBM QRadar SIEM to execute arbitrary code, escalate privileges, conduct a denial of service attack, disclose information, and bypass security measures.
CSIRTS triage
- What
- An attacker can exploit multiple vulnerabilities to execute arbitrary code and escalate privileges.
- Who is affected
- Deployments of IBM QRadar SIEM are affected.
- Urgency
- Remediation is urgent due to high severity and confirmed exploitation.
- Action
- Apply available patches to mitigate the vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (1)
- high[UPDATE] [high] IBM QRadar SIEM: Multiple vulnerabilitiescert-bund · 2026-07-29
External references
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[](https://www.csirts.com/cve/CVE-2026-28421)