CVE-2026-10293: UTT HiPER 1200GW Stack Buffer Overflow – Critical Patch Guidance

Technical summary

The vulnerability is a classic stack-based buffer overflow in the strcpy() function within the /goform/formFireWall endpoint. The flaw is triggered by manipulation of the 'Profile' parameter, which is copied into a fixed-size stack buffer without length validation. This maps to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow). The attack requires authentication but is network-accessible, making it exploitable from any network segment where the device is reachable.

Business impact

A successful exploit could allow an authenticated insider or network-adjacent attacker to fully compromise the firewall appliance, potentially leading to network segmentation bypass, lateral movement into protected segments, exfiltration of sensitive traffic or configuration data, and denial of service. For organizations relying on the HiPER 1200GW as a perimeter or internal security boundary, this represents a direct threat to network integrity and confidentiality.

Affected systems

UTT HiPER 1200GW devices running firmware version 2.5.3-170306 and earlier are affected. Organizations should audit deployed instances to confirm version numbers. Devices running versions later than 2.5.3-170306 may be patched; verify against the vendor advisory to confirm the fixed version threshold.

Exploitability

The attack vector is network-based and requires valid authentication credentials (CWE score reflects PR:L—low privileges required). However, the availability of public exploit code significantly lowers the barrier to weaponization. Internal threat actors, compromised accounts, or attackers on a shared network segment could exploit this without advanced reverse engineering. The straightforward nature of buffer overflow attacks means that once proof-of-concept code exists, exploitation becomes routine.

Remediation

Immediately update the UTT HiPER 1200GW firmware to a version confirmed patched by the vendor (verify the exact version number in the vendor security advisory, as it may differ from version 2.5.3-170306 or later). Until patching is possible, restrict network access to the device's management interface to trusted administrative hosts and networks, implement role-based access controls to minimize users with firewall configuration privileges, and monitor for unusual login patterns or configuration changes.

Patch guidance

Contact UTT or consult the official vendor security advisory to identify and validate the patched firmware version. Apply patches in a change-controlled manner in a maintenance window, as firewall firmware updates may cause brief service interruption. Test the patch in a staging environment first to verify compatibility with your configuration. Once patches are available and validated, prioritize devices that are externally accessible or manage critical network segments.

Detection guidance

Monitor authentication logs to the /goform/formFireWall endpoint for unusual access patterns, especially from accounts with limited typical usage. Watch for HTTP requests with abnormally long or malformed 'Profile' parameter values. Network behavior analytics that flag unusual data flow from the device to external hosts may catch post-exploitation activity. Intrusion detection systems with buffer overflow signatures may catch exploitation attempts, but signature-based detection is less reliable for memory corruption attacks. Log aggregation and anomaly detection are more valuable here.

Why prioritize this

This vulnerability combines high inherent severity (CVSS 8.8, with confidentiality, integrity, and availability impact), authenticated but network-accessible exploitability, and public proof-of-concept code. The risk is further amplified by the firewall's trust role in network defense—a compromised appliance becomes an insider threat. Organizations should patch as soon as validated firmware is available, and should apply emergency access controls immediately if patching is delayed.

Risk score, explained

The CVSS 3.1 score of 8.8 (HIGH) reflects full impact across confidentiality, integrity, and availability (CIA:H/H/H), network accessibility (AV:N), low attack complexity (AC:L), and low privileges required (PR:L). The score appropriately penalizes the authentication requirement but does not discount public exploit code availability—that is a contextual risk multiplier handled outside CVSS. Organizations should treat this as urgent despite the authentication requirement, given the device's role and the exploit's maturity.

Frequently asked questions