Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor confirms unauthenticated, easily exploitable network TCP attack yielding full takeover, so AV:N/AC:L/PR:N/UI:N with C:H/I:H/A:H.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCP to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
AnalysisAI
Remote takeover of Oracle Coherence (Oracle Fusion Middleware, Core component) allows an unauthenticated network attacker to fully compromise affected versions 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 over TCP. Oracle rates the flaw CVSS 9.8 with full confidentiality, integrity, and availability impact and describes it as "easily exploitable," meaning no authentication, user interaction, or special access is required. No public exploit identified at time of analysis, and the CVE is not currently listed in CISA KEV; remediation is delivered through the Oracle July 2026 Critical Patch Update.
Technical ContextAI
Oracle Coherence is a distributed in-memory data grid and caching platform bundled with Oracle Fusion Middleware, used to scale stateful Java applications across clustered nodes that communicate over TCP (and Coherence*Extend/Tangosol Cluster Management Protocol). The affected 'Core' component handles cluster membership and data serialization, and Coherence historically exposes network-facing services that deserialize objects from cluster or proxy traffic - a class of issue frequently rooted in unsafe deserialization of untrusted data (CWE-502), though NVD lists no specific CWE for this CVE. The single CPE provided (cpe:2.3:a:oracle_corporation:oracle_coherence) is version-wildcarded, so precise affected ranges must be taken from Oracle's advisory text (14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0) rather than the CPE. The Oracle-supplied tag 'Information Disclosure' understates the impact, since the CVSS vector and description both indicate full system takeover rather than mere data exposure.
RemediationAI
Apply the Oracle July 2026 Critical Patch Update (patch available per vendor advisory at https://www.oracle.com/security-alerts/cpujul2026.html); Oracle's CPU model ships the fix as cumulative patches for each affected release train (14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0) rather than as a single tagged version, so identify and deploy the specific patch matching your installed version and stack. Because the vector is unauthenticated over TCP, prioritize network-level compensating controls until patching completes: restrict Coherence cluster ports and any Coherence*Extend/proxy listener ports to trusted management subnets via firewall/security-group rules (this can break legitimate cross-node or client-extend traffic if not scoped carefully), place Coherence nodes on an isolated back-end VLAN with no direct internet or general LAN exposure, and enable Coherence's authentication/TLS transport features on proxy and cluster communication where supported (adds latency and configuration overhead but blocks anonymous TCP access). Avoid exposing any Coherence service directly to untrusted networks. Because no patch version string is given in the input, do not assume a version number - confirm the exact patch identifier in the CPU advisory before deployment.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46625
GHSA-fgcr-f77f-8q95