CVE-2026-21926

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{}

{"analysis": {"en": {"generated_at": "2026-04-18T04:40:07.731720+00:00", "value": {"mitigation_remediation": ["Apply the latest Oracle Customer Advisory and patch released in January\u202f2026 for versions\u202f17.0\u201325.2.", "If patching is not immediately feasible, limit network access to the deployment service to trusted IP ranges and consider enforcing TLS client certificates.", "Deploy an application\u2011level firewall or access control that filters malicious packets and monitor logs for repeated crash attempts."], "summary": {"action": "Patch", "impact": "Denial of Service (Availability Impact)"}, "threat_synthesis": {"affected_systems": "Oracle Corporation: Siebel CRM Deployment, versions 17.0 through 25.2, specifically the Server Infrastructure component; any environment running these versions is vulnerable.", "description_and_impact": "A vulnerability exists in the Server Infrastructure component of Oracle Siebel CRM Deployment that allows an unauthenticated attacker with network access via TLS to trigger a crash or repeated hang, resulting in a denial of service. The flaw does not compromise confidentiality or integrity, but it can completely stop the deployment service from functioning.", "risk_and_exploitability": "The CVSS 3.1 base score of 7.5 indicates high severity. The EPSS score is below 1%, suggesting low but non-zero exploitation likelihood, and the vulnerability is not listed in the CISA KEV catalog. Attackers can exploit the issue remotely over network TLS connections without requiring authentication, making the attack readily achievable for anyone who can reach the deployment service."}}}}, "created": "2026-04-18T04:45:36.865124+00:00", "updated": "2026-04-18T04:45:36.865135+00:00", "vendors": []}