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CVE-2026-0841: High Vulnerability in UTT 520W Firmware

A high-severity buffer overflow vulnerability exists in UTT 520W firmware, allowing remote exploitation. Immediate patching is essential to mitigate risks associated with this vulnerability.

HIGHCVSS 7.4 · Published January 11, 2026

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A vulnerability was detected in UTT 进取 520W 1.7.7-180627. Affected by this issue is the function strcpy of the file /goform/formPictureUrl. The manipulation of the argument importpictureurl results in buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

With a CVSS score of 7.4, this vulnerability is classified as high severity, indicating a significant risk to organizations using the affected firmware. Attackers may leverage this vulnerability to execute unauthorized commands, potentially compromising sensitive data and system integrity.

Organizations should prioritize patching immediately. Failure to address this vulnerability could expose systems to remote attacks, leading to severe consequences.

In light of the known exploit being public, defenders must act swiftly to mitigate these risks and protect their environments.

Vulnerability Details

The specific vulnerability is a buffer overflow occurring in the UTT 520W firmware version 1.7.7-180627. The issue arises from improper handling of the input for the importpictureurl parameter in the strcpy function located in /goform/formPictureUrl. This vulnerability allows for possible remote exploitation by an attacker. The CVSS 4.0 base score is 7.4, indicating high severity, and it impacts confidentiality, integrity, and availability.

The vulnerability has been assigned the CWE identifiers CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input).

Technical Analysis

The root cause of this vulnerability stems from inadequate validation of input parameters leading to a buffer overflow condition. This vulnerability can be exploited over the network, with low attack complexity and low privileges required. User interaction is not necessary, making it easier for attackers to exploit.

The attack can lead to high impact on confidentiality, integrity, and availability of the affected systems, hence the urgency for organizations to address it.

Risk & Impact Analysis

Risk to organizations includes potential unauthorized access to sensitive data, system control, and interruption of service. Given the high CVSS score and the nature of the vulnerability, it poses a significant risk in deployed environments.

Organizations should address this vulnerability in their patch management cycles, particularly given its potential impact on business operations and data integrity.

Signal

Status

Known Exploit

Yes

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

The affected version is UTT 520W firmware version 1.7.7-180627. All versions prior to vendor patch are vulnerable.

Mitigation & Remediation

Organizations should implement the following measures to mitigate this vulnerability: apply available patches provided by the vendor, implement configuration hardening, and monitor for unusual activity that may indicate exploitation attempts.

For a comprehensive approach to security testing, organizations can utilize penetration testing services to uncover similar vulnerabilities.

Detection Guidance

To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual access patterns to /goform/formPictureUrl and look for any unauthorized changes in system behavior.

AppSecure Threat Intelligence Insight

The existence of this vulnerability highlights the critical need for organizations to prioritize security in their firmware updates. Regular vulnerability assessments can help identify similar issues. For further insights into vulnerability management, organizations can refer to our vulnerability management program. Additionally, organizations should consider engaging in penetration testing methodology to proactively identify and remedy vulnerabilities.

Overall, this vulnerability serves as a reminder of the importance of maintaining robust security practices and staying informed about potential threats in the landscape.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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