CVE-2026-62604 Overview
CVE-2026-62604 is an information disclosure vulnerability in the Oracle Hyperion Calculation Manager, a component of Oracle Hyperion. The affected release is version 11.2.25.0.000, specifically the Security component. An unauthenticated attacker with access to the physical communication segment attached to the hardware where Oracle Hyperion Calculation Manager runs can exploit this flaw to read a subset of accessible data. Exploitation is difficult and requires adjacent network positioning. The disclosure is limited to confidentiality impact, with no integrity or availability effect.
Critical Impact
Successful exploitation grants unauthorized read access to a subset of Oracle Hyperion Calculation Manager data, exposing sensitive financial and configuration information handled by the application.
Affected Products
- Oracle Hyperion Calculation Manager 11.2.25.0.000
- Oracle Hyperion (Security component)
- Deployments exposing the Calculation Manager on shared physical network segments
Discovery Timeline
- 2026-08-18 - CVE-2026-62604 published to NVD
- 2026-08-18 - Oracle publishes Oracle Security Alert August 2026
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-62604
Vulnerability Analysis
The vulnerability resides in the Security component of Oracle Hyperion Calculation Manager. An attacker positioned on the same physical communication segment as the host running the application can interact with the service without authentication. Successful exploitation leaks a subset of application-accessible data. The scope remains unchanged, and integrity and availability are not impacted. Exploitation complexity is high, requiring specific conditions on the adjacent network to succeed.
Oracle classifies the issue under the Security component, indicating the flaw involves how the application handles trust or protection of data on the local network. The absence of privilege or user interaction requirements means any attacker with adjacent-network access can attempt exploitation, though the high attack complexity limits practical risk. EPSS scoring places this issue at low probability of near-term exploitation.
Root Cause
Oracle has not published a detailed root cause. Based on the Oracle advisory, the flaw exists in the Security component of Calculation Manager and results in information exposure to attackers on the adjacent network. The vector indicates the service transmits, exposes, or fails to protect data reachable from the same broadcast or link-layer segment as the host.
Attack Vector
The attack vector is Adjacent Network. An attacker must reside on the same physical communication segment as the target Hyperion Calculation Manager host. No credentials, user interaction, or elevated privileges are required. Consult the Oracle Security Alert August 2026 for exploit conditions and vendor guidance. No public proof-of-concept exists, and no exploitation in the wild has been reported.
Detection Methods for CVE-2026-62604
Indicators of Compromise
- Unexpected network probes or traffic captures originating from hosts on the same VLAN or physical segment as Hyperion Calculation Manager servers.
- Unusual sessions or connection attempts to Calculation Manager service ports from non-administrative endpoints.
- Anomalous data egress patterns from Hyperion application servers to adjacent hosts.
Detection Strategies
- Monitor internal network telemetry for unauthenticated access attempts against the Calculation Manager service.
- Baseline normal client access to Hyperion servers and alert on connections from hosts that do not typically communicate with the application tier.
- Inspect switch and firewall logs for lateral traffic within the VLAN hosting Oracle Hyperion components.
Monitoring Recommendations
- Enable NetFlow or packet capture on segments hosting Oracle Hyperion to detect reconnaissance activity.
- Correlate Hyperion application logs with network flow data to identify unauthorized read operations.
- Track configuration and access changes on the Security component of Calculation Manager version 11.2.25.0.000.
How to Mitigate CVE-2026-62604
Immediate Actions Required
- Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert August 2026.
- Inventory all Oracle Hyperion Calculation Manager deployments running version 11.2.25.0.000.
- Restrict network access to Hyperion servers to trusted administrative hosts only.
Patch Information
Oracle addresses CVE-2026-62604 through the August 2026 Security Alert. Administrators should follow the vendor's patch matrix in the Oracle Security Alert August 2026 and apply the update for Oracle Hyperion Calculation Manager 11.2.25.0.000. Validate patch application in a non-production environment before rolling changes to production Hyperion tiers.
Workarounds
- Segment Hyperion Calculation Manager hosts onto dedicated VLANs with strict access control lists limiting adjacent-network exposure.
- Enforce network access controls such as 802.1X and private VLANs to reduce the population of hosts on the same physical segment.
- Disable or firewall unused Calculation Manager service interfaces where feasible until patching completes.
# Configuration example: restrict access to the Hyperion Calculation Manager port using iptables
iptables -A INPUT -p tcp --dport 8500 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8500 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
