CVE-2026-42253
An attacker can exploit multiple vulnerabilities in IBM QRadar SIEM to bypass security measures, escalate privileges, conduct a denial of service attack, disclose information, manipulate files, conduct a cross-site scripting attack, and execute arbitrary code.
CSIRTS triage
- What
- Multiple vulnerabilities in IBM QRadar SIEM enable bypass of security measures, privilege escalation, denial-of-service, information disclosure, file manipulation, cross-site scripting, and arbitrary code execution.
- Who is affected
- Organizations operating IBM QRadar SIEM deployments.
- Urgency
- Critical; actively exploited vulnerabilities in security infrastructure affecting detection and response capabilities.
- Action
- Apply all available security patches from IBM for QRadar SIEM immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Moderate exploitation risk1.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 63% of all EPSS-scored CVEs.
Advisory coverage (4)
- unknownexploitedMultiple vulnerabilities in IBM products (August 28, 2026)cert-fr-avis · 2026-08-28
- highexploited[NEW] [high] IBM QRadar SIEM: Multiple vulnerabilitiescert-bund · 2026-08-27
- unknownMultiple vulnerabilities in IBM products (July 31, 2026)cert-fr-avis · 2026-07-31
- mediumGHSA-8wm6-6fqh-phmc: Apache ActiveMQ, Apache ActiveMQ Web have a Cross-site Scripting issueghsa · 2026-06-01
External references
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