CVE-2026-76747 in AOS-Switch
Summary
by MITRE • 10/06/2026
Buffer overflow vulnerabilities exist in the affected interface of AOS-S. Successful exploitation could allow an unauthenticated remote attacker to expose sensitive memory contents and cause a denial of service on the device.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/07/2026
The identified vulnerability represents a critical buffer overflow condition located within the application layer processing logic of the Aruba Operating System Software, commonly referred to as AOS-S. This specific flaw arises from improper boundary checking when handling input data destined for fixed-size memory buffers. In systems engineering, such errors typically occur when software fails to validate the length of incoming requests against the allocated buffer size before copying data into it. When an attacker supplies a payload that exceeds the expected limits, the excess data spills over adjacent areas in the computer's random-access memory. This overwrite operation corrupts the stack or heap structure, leading to unpredictable system behavior. The presence of this vulnerability indicates a fundamental lapse in secure coding practices during the development phase, specifically regarding input validation and bounds checking mechanisms which are essential for maintaining application integrity against malicious inputs.
From an operational perspective, the exploitation of this buffer overflow yields two distinct but severe consequences: information disclosure and service disruption. First, by overwriting memory structures such as return addresses or function pointers, a skilled attacker can manipulate the control flow of the program to execute arbitrary code or read out adjacent memory regions. This capability allows for the exposure of sensitive memory contents, which may include cryptographic keys, session tokens, user credentials, or other proprietary data stored in the device's volatile memory. The leakage of such information compromises the confidentiality guarantees provided by the network infrastructure. Second, if the attacker chooses not to execute code but instead focuses on corrupting critical system structures without a valid return path, the application process will crash immediately. Since this interface is likely part of a core service handling management or data plane traffic, crashing it results in a denial of service condition. This disrupts connectivity for legitimate users and can potentially destabilize the entire network device if the component is essential to its operation, thereby impacting availability and business continuity.
In terms of threat modeling and industry standards, this vulnerability aligns with CWE-120, which classifies buffer copy without checking size limits as a classic memory safety issue. The ability to read sensitive memory contents maps directly to CWE-125, indicating an out-of-bounds read condition that facilitates data exfiltration. Furthermore, the potential for remote exploitation by an unauthenticated actor places this flaw within the initial access and discovery phases of the MITRE ATT&CK framework. Specifically, it relates to techniques involving network service scanning or direct exploitation of application vulnerabilities to gain a foothold in the environment. The lack of authentication required for exploitation significantly elevates the risk profile, as any entity with network reachability to the affected interface can attempt this attack without needing valid credentials, making it particularly dangerous in publicly accessible or poorly segmented networks.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary corrective action is the deployment of vendor-provided software patches that update the AOS-S firmware to a version where the buffer overflow has been resolved through proper input validation and bounds checking. Administrators should prioritize applying these updates in environments where the affected interface is exposed to untrusted networks. In cases where immediate patching is not feasible due to operational constraints, network-level mitigations such as access control lists or firewall rules can be implemented to restrict traffic from unknown sources to the specific ports associated with the vulnerable service. Additionally, enabling strict logging and monitoring for anomalous packet sizes or unusual connection patterns can help detect exploitation attempts in real-time. Long-term resilience requires integrating static application security testing tools into the development lifecycle to automatically identify buffer overflow risks before code deployment, ensuring that future versions adhere to secure coding standards like those outlined in OWASP guidelines for memory safety.