CVE-2026-60411 Overview
CVE-2026-60411 affects the ttcserver component of Oracle TimesTen In-Memory Database version 26.1.1.1.0. The flaw allows an unauthenticated attacker with access to the adjacent network segment to trigger a hang or repeatable crash of the database service. Successful exploitation results in a complete denial of service (DoS) of the TimesTen In-Memory Database instance. No user interaction is required, and attack complexity is low. The vulnerability does not affect confidentiality or integrity, but availability impact is high.
Critical Impact
Unauthenticated adjacent-network attackers can cause a complete denial of service against Oracle TimesTen In-Memory Database instances running the affected version.
Affected Products
- Oracle TimesTen In-Memory Database 26.1.1.1.0
- Component: ttcserver
- Deployments exposing TimesTen on shared physical or virtual network segments
Discovery Timeline
- 2026-07-21 - CVE CVE-2026-60411 published to NVD
- 2026-07-21 - Last updated in NVD database
- July 2026 - Addressed in Oracle Security Alert July 2026
Technical Details for CVE-2026-60411
Vulnerability Analysis
The vulnerability resides in ttcserver, the TimesTen Client/Server component responsible for handling client connections to the in-memory database. An attacker positioned on the same physical communication segment as the target host can send crafted traffic that induces a hang or crash in the server process. The service becomes unresponsive to legitimate clients until manual intervention or automated restart occurs. Because no authentication or user interaction is required, any host on the attached network segment can trigger the condition. The impact is limited to availability; confidentiality and integrity of stored data are not directly affected by this specific flaw.
Root Cause
Oracle has not disclosed low-level technical details beyond the advisory. The behavior — repeatable crash and hang triggered by network input to ttcserver — is consistent with improper input validation or resource handling in the client/server protocol parser. See the Oracle Security Alert July 2026 for vendor-supplied information.
Attack Vector
Exploitation requires adjacent network access, meaning the attacker must be on the same broadcast domain, VLAN, or physical segment as the TimesTen host. The attacker sends malformed or specific traffic to the ttcserver listener. No credentials, prior access, or user interaction are required. In shared data center or cloud tenancy environments where network segmentation is weak, this expands the practical attack surface. The EPSS probability at publication was low, and no public exploit or proof-of-concept has been observed.
No verified proof-of-concept code is publicly available. Refer to the Oracle advisory for authoritative technical guidance.
Detection Methods for CVE-2026-60411
Indicators of Compromise
- Unexpected termination or hang of the ttcserver process on TimesTen hosts
- Repeated TimesTen client connection failures or timeouts across multiple clients simultaneously
- Anomalous inbound traffic to TimesTen listener ports from adjacent-network hosts not previously seen as clients
Detection Strategies
- Monitor ttcserver process uptime and correlate restarts with inbound network events from the local segment
- Baseline normal TimesTen client source addresses and alert on new or unauthorized sources connecting to the listener
- Inspect application and database logs for abrupt session terminations and connection resets originating from ttcserver
Monitoring Recommendations
- Enable host-level process crash and service restart alerting for the TimesTen daemon set
- Capture and retain network flow data on segments hosting TimesTen instances for post-incident review
- Alert on repeated TCP resets or malformed protocol frames directed at TimesTen client/server ports
How to Mitigate CVE-2026-60411
Immediate Actions Required
- Apply the July 2026 Oracle Critical Patch Update for TimesTen In-Memory Database 26.1.1.1.0 as documented in the Oracle Security Alert July 2026
- Restrict network access to TimesTen listener ports so only authorized application hosts can reach ttcserver
- Audit which hosts share the physical or virtual network segment with TimesTen servers and remove untrusted tenants
Patch Information
Oracle addressed CVE-2026-60411 in the July 2026 Critical Patch Update. Administrators should review the Oracle Security Alert July 2026 for the exact patch bundle applicable to version 26.1.1.1.0 and apply it during the next available maintenance window.
Workarounds
- Isolate TimesTen instances on dedicated VLANs or private subnets with strict access control lists
- Enforce host-based firewall rules that permit ttcserver connections only from known application servers
- Implement network segmentation and micro-segmentation to eliminate adjacent-network exposure in shared environments
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
