CVE-2026-1139
Unknown Unknown - Not Provided
Remote Buffer Overflow in UTT 进取 520W strcpy Function

Publication date: 2026-01-19

Last updated on: 2026-02-04

Assigner: VulDB

Description
A vulnerability has been found in UTT 进取 520W 1.7.7-180627. This vulnerability affects the function strcpy of the file /goform/ConfigExceptMSN. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Meta Information
Published
2026-01-19
Last Modified
2026-02-04
Generated
2026-06-16
AI Q&A
2026-01-19
EPSS Evaluated
2026-06-15
NVD
CVE-2026-1139
EUVD
EUVD-2026-3239
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
unknown_vendor utt_进取_520w 1.7.7-180627
utt 520w_firmware to 1.7.7-180627 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
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Executive Summary

CVE-2026-1139 is a critical buffer overflow vulnerability in the UTT 进取 520W device, version 1.7.7-180627. It occurs in the strcpy function within the /goform/ConfigExceptMSN file, where user input is copied into a buffer without checking the input size. This unchecked copy leads to a buffer overflow, which can be triggered remotely by an attacker. The vulnerability arises from improper memory handling (CWE-120 and CWE-119) and allows exploitation without authentication. [2, 3]

Impact Analysis

Exploitation of this vulnerability can allow an attacker to perform a denial-of-service (DoS) attack against the affected router, compromising its availability. Additionally, the attacker may compromise the confidentiality, integrity, and availability of the system. The vulnerability is remotely exploitable and considered easy to exploit, with a public proof-of-concept available. There are no known mitigations, and the vendor did not respond to the disclosure. [2, 3]

Detection Guidance

This vulnerability can be detected by monitoring HTTP requests to the /goform/ConfigExceptMSN endpoint on the UTT 进取 520W router, specifically looking for unusually long or malformed input parameters that could trigger the strcpy buffer overflow. Since a proof-of-concept exploit is publicly available, network intrusion detection systems (NIDS) can be configured to detect exploit attempts targeting this endpoint. However, no specific detection commands are provided in the resources. [2, 3]

Mitigation Strategies

Immediate mitigation steps include discontinuing use of the affected UTT 进取 520W device version 1.7.7-180627, as no known mitigations or patches are available. It is recommended to replace the affected product with an alternative device. Additionally, restricting network access to the vulnerable endpoint and monitoring for exploit attempts can help reduce risk until replacement. [3]

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