Ethical Hacking News
A critical vulnerability has been identified in the QNAP NetBak PC Agent software, which could allow attackers to hijack credentials or bypass security controls. Users of this software are urged to update their systems with the latest ASP.NET Core patches in order to mitigate the risk posed by CVE-2025-55315.
A critical vulnerability (CVE-2025-55315) was discovered in QNAP NetBak PC Agent, leaving users vulnerable to attacks.The flaw resides within the ASP.NET Core framework and allows low-privilege attackers to hijack credentials or bypass security controls via HTTP request smuggling.Users running affected systems may be able to access sensitive data, modify files, or cause DoS attacks if exploited by an authenticated attacker.QNAP recommends updating systems with the latest ASP.NET Core updates through reinstalling or manually downloading and installing the latest runtime hosting bundle.User compliance with timely software updates and security best practices is essential to mitigate the risk posed by CVE-2025-55315.
Critical ASP.NET flaw hits QNAP NetBak PC Agent, leaving users vulnerable to sophisticated attacks.
A recent security alert has brought attention to a critical vulnerability in the QNAP NetBak PC Agent, a software solution designed to provide automatic backups for Windows systems. The issue, identified as CVE-2025-55315, resides within the ASP.NET Core framework and is deemed severe enough to warrant an advisory from Microsoft. This particular flaw allows low-privilege attackers to hijack credentials or bypass front-end security controls via HTTP request smuggling, potentially resulting in unauthorized access to sensitive data, file modification, or even a denial-of-service (DoS).
The affected NetBak PC Agent software has been discovered to rely heavily on Microsoft ASP.NET Core components during its setup process. Consequently, computers running this software may contain an affected version of ASP.NET Core if the system has not been updated with the latest security patches. This is particularly concerning, as a successful exploitation of CVE-2025-55315 by an authenticated attacker can enable them to send crafted HTTP requests in order to access sensitive information, modify server files, or cause limited DoS attacks.
In response to this vulnerability, QNAP has issued a recommendation for users to update their systems with the latest ASP.NET Core updates. This is achievable through two distinct approaches: reinstalling the NetBak PC Agent by uninstalling the current version via the Settings app and then downloading and running the latest installer, which automatically updates the ASP.NET Core runtime components; or manually updating ASP.NET Core by visiting the .NET 8.0 download page, installing the latest runtime hosting bundle (currently at version 8.0.21 as of October 2025), and restarting the application or system.
The discovery of this vulnerability highlights the importance of timely software updates and adherence to security best practices among users of software solutions like QNAP NetBak PC Agent. Users are advised to prioritize the update of their systems with the latest ASP.NET Core patches in order to mitigate the risk posed by CVE-2025-55315.
Related Information:
https://www.ethicalhackingnews.com/articles/Critical-ASPNET-Flaw-Exposed-QNAP-NetBak-PC-Agent-Under-Siege-ehn.shtml
https://securityaffairs.com/183951/security/critical-asp-net-flaw-hits-qnap-netbak-pc-agent.html
https://nvd.nist.gov/vuln/detail/CVE-2025-55315
https://www.cvedetails.com/cve/CVE-2025-55315/
Published: Tue Oct 28 12:22:04 2025 by llama3.2 3B Q4_K_M
