CVE-2026-7513 Overview
CVE-2026-7513 is a buffer overflow vulnerability affecting UTT HiPER 1200GW routers running firmware versions up to 2.5.3-170306. The flaw resides in the strcpy function within the /goform/formRemoteControl endpoint. Attackers can trigger the overflow remotely over the network by manipulating input passed to the vulnerable function. Public disclosure of the exploit details has occurred, increasing the likelihood of opportunistic exploitation against exposed devices. The vulnerability falls under [CWE-119], improper restriction of operations within the bounds of a memory buffer.
Critical Impact
Remote attackers with low-privileged network access can corrupt memory on affected UTT HiPER 1200GW routers, potentially leading to arbitrary code execution or device compromise.
Affected Products
- UTT HiPER 1200GW router
- Firmware versions up to and including 2.5.3-170306
- Devices exposing the /goform/formRemoteControl web management endpoint
Discovery Timeline
- 2026-05-01 - CVE-2026-7513 published to NVD
- 2026-05-01 - Last updated in NVD database
Technical Details for CVE-2026-7513
Vulnerability Analysis
The vulnerability exists in the request handler for /goform/formRemoteControl on the UTT HiPER 1200GW router web interface. The handler invokes the unsafe C library function strcpy without validating the length of attacker-controlled input. When the supplied parameter exceeds the destination buffer size, adjacent stack or heap memory is overwritten. This memory corruption can disrupt router operation or be leveraged to redirect execution flow on the embedded device. The classification under [CWE-119] reflects the absence of bounds checking during the copy operation.
Root Cause
The root cause is the use of strcpy to handle user-supplied data inside the formRemoteControl form processor. The function copies bytes from source to destination until it encounters a null terminator, with no awareness of buffer capacity. Embedded firmware on consumer routers frequently lacks modern exploit mitigations such as stack canaries, address space layout randomization, and non-executable memory regions. This combination converts a simple input handling bug into a viable code execution primitive.
Attack Vector
An authenticated attacker with low privileges submits a crafted HTTP request to /goform/formRemoteControl containing an oversized parameter value. The request travels over the network, requiring no user interaction on the target. Successful exploitation corrupts process memory and can lead to denial of service or arbitrary code execution under the privileges of the web management daemon. The vulnerability mechanism is described in the GitHub vulnerability documentation and the VulDB entry #360324.
Detection Methods for CVE-2026-7513
Indicators of Compromise
- HTTP POST requests to /goform/formRemoteControl containing abnormally long parameter values exceeding typical form field sizes.
- Unexpected reboots, crashes, or service restarts of the router web management interface.
- Outbound connections from the router to unfamiliar external hosts following suspicious administrative requests.
- Configuration changes to the router that were not initiated by authorized administrators.
Detection Strategies
- Inspect HTTP traffic destined for the router management interface and flag requests with parameter lengths inconsistent with normal form submissions.
- Deploy network intrusion detection signatures targeting oversized POST bodies sent to /goform/formRemoteControl.
- Correlate authentication events with subsequent requests to administrative endpoints to identify abuse from low-privileged accounts.
Monitoring Recommendations
- Centralize router syslog and HTTP access logs in a SIEM for retention and pattern analysis.
- Alert on repeated requests to /goform/formRemoteControl from a single source within short time windows.
- Monitor for changes in router firmware version, configuration files, and administrative account inventories.
How to Mitigate CVE-2026-7513
Immediate Actions Required
- Restrict access to the router web management interface to trusted internal networks only and disable WAN-side administration.
- Audit administrative accounts and remove any unused or low-privileged accounts that could be abused to reach the vulnerable endpoint.
- Place affected UTT HiPER 1200GW devices behind a network access control layer that filters HTTP requests to /goform/formRemoteControl.
Patch Information
No vendor patch information is currently available in the published CVE references. Administrators should monitor UTT vendor channels for firmware updates that supersede version 2.5.3-170306. Consult the VulDB vulnerability details #360324 for any updates on remediation status.
Workarounds
- Block external access to TCP ports hosting the router web management interface at the network perimeter.
- Enforce strong, unique credentials for all router administrative accounts to reduce opportunities for low-privileged abuse.
- Segment vulnerable routers onto isolated management VLANs with strict access control lists.
- Consider replacing end-of-life or unpatched UTT HiPER 1200GW devices with supported hardware where vendor updates remain unavailable.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
