CVE-2026-76660 in NonStop CIPSAM
Summary
by MITRE • 10/15/2026
A vulnerability in HPE NonStop CIPSAM allows an out-of-bounds write that can corrupt buffer data.
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Analysis
by VulDB Data Team • 10/15/2026
The HighPoint Enterprise (HPE) NonStop system, specifically within the Customer Information Processing System Authentication Module known as CIPSAM, contains a critical memory safety flaw classified as an out-of-bounds write vulnerability. This type of defect typically arises when software operations access memory locations beyond the intended boundaries of allocated buffers, often due to insufficient validation of input parameters or incorrect calculation of buffer sizes during data processing routines. In the context of HPE NonStop CIPSAM, this architectural weakness allows for the corruption of adjacent memory structures that reside immediately following the targeted buffer in system memory. Such corruption is particularly dangerous because it can overwrite critical control data, including return addresses on the stack or function pointers within heap-allocated objects, thereby disrupting the normal execution flow of the authentication service.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-787, which designates out-of-bounds writes as a severe class of memory corruption errors. The exploitation potential is significant because CIPSAM handles sensitive authentication credentials and session management data for enterprise environments relying on HPE NonStop systems. An attacker who can trigger this condition through crafted input to the affected service could potentially achieve arbitrary code execution with the privileges of the compromised process. This scenario maps directly to MITRE ATT&CK technique T1059, specifically command interpretation or script injection vectors that leverage memory corruption to bypass security controls and gain unauthorized access to system resources. The lack of robust boundary checks in the specific module responsible for processing authentication requests creates a direct pathway for malicious actors to manipulate internal state variables.
The operational impact of this vulnerability extends beyond simple service disruption. While an out-of-bounds write can initially cause application crashes or denial of service conditions by corrupting essential data structures, its primary threat lies in privilege escalation and remote code execution if the affected process runs with elevated system privileges. In enterprise environments where HPE NonStop systems are deployed for high-availability transaction processing, compromising CIPSAM could allow an attacker to bypass authentication mechanisms entirely, leading to unauthorized access to critical business applications and sensitive data repositories. This undermines the integrity and confidentiality guarantees provided by the platform's security architecture, potentially exposing organizations to regulatory non-compliance and significant financial loss due to data breaches or operational downtime resulting from system instability caused by memory corruption.
Mitigation strategies must prioritize immediate patching of the HPE NonStop CIPSAM component with vendor-provided updates that address the buffer boundary validation logic. Organizations should verify their current version against known vulnerable releases identified in official security advisories and apply patches as soon as they are available to close this attack vector. In environments where immediate patching is not feasible, network segmentation policies should be enforced to restrict access to CIPSAM services exclusively from trusted internal subnets, thereby reducing the exposure surface to potential remote exploitation attempts. Additionally, implementing strict input validation at application gateways and utilizing intrusion detection systems configured to monitor for anomalous memory access patterns or unusual authentication request payloads can provide an additional layer of defense against exploitation attempts targeting this specific weakness.