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Vulnerability record · CVE-2025-62842 · published 2 January 2026

CVE-2025-62842: Qnap hybrid backup sync vulnerability

Qnap · Hybrid Backup Sync

An external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local network access, they can then exploit the vulnerability to read or modify files or directories. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 26.2.0.938 and later

7.0 CVSS 4.0 High EPSS 0.26% · top 83.9% CWE-73 · CWE-73
7.0CVSS 4.0 base score
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
25 Jul 2026Last modified by NVD

Description

An external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local network access, they can then exploit the vulnerability to read or modify files or directories. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 26.2.0.938 and later

CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.qnap.com/en/security-advisory/qsa-25-46 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-28799QNAP HBS 3 improper authorization allows remote loginQNAP Hybrid Backup Sync 3 (HBS 3) contains an improper authorization flaw that lets remote attackers log in to the NAS device. The issue affects mult…KEVEPSS 78%analysed9.8CVE-2021-28809Qnap hybrid backup sync improper access control vulnerabilityAn improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attack…EPSS 16%9.5CVE-2024-50388Qnap hybrid backup sync command injection vulnerabilityAn OS command injection vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote attack…EPSS 2.3%7.0CVE-2025-62840Qnap hybrid backup sync error message information leak vulnerabilityA generation of error message containing sensitive information vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gai…EPSS 0.24%6.3CVE-2024-53695Qnap hybrid backup sync classic buffer overflow vulnerabilityA buffer overflow vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to…EPSS 0.51%8.8CVE-2025-33053Microsoft Windows WebDAV Internet Shortcut File Path Control RCEWindows Internet Shortcut (.url) files allow external control of a file name or path, which an unauthorized attacker can abuse to execute code over a…KEVEPSS 87%analysed5.4CVE-2025-24054Windows NTLM file path control allows spoofingWindows NTLM mishandles externally controlled file names or paths, letting an unauthorized attacker perform spoofing over a network. The flaw affects…KEVEPSS 59%analysed7.1CVE-2025-0111PAN-OS authenticated file read via management web interfacePAN-OS contains an authenticated file read vulnerability that lets a user with network access to the management web interface read files on the PAN-O…KEVEPSS 2.0%analysed

Source: NIST National Vulnerability Database (record CVE-2025-62842), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.