QNAP HBS 3 Hybrid Backup Sync 25.1.1.673/25.1.4.952 file inclusion

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in QNAP HBS 3 Hybrid Backup Sync. This impacts an unknown function. The manipulation leads to file inclusion. This vulnerability is referenced as CVE-2025-62842. It is possible to launch the attack on the physical device. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in QNAP HBS 3 Hybrid Backup Sync. It has been rated as critical. This issue affects some unknown functionality. The manipulation with an unknown input leads to a file inclusion vulnerability. Using CWE to declare the problem leads to CWE-73. The product allows user input to control or influence paths or file names that are used in filesystem operations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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

The weakness was published with Pwn2Own 2025 as qsa-25-46. The advisory is shared at qnap.com. The identification of this vulnerability is CVE-2025-62842 since 10/24/2025. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 26.2.0.938 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-0662). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: File inclusion
CWE: CWE-73
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: HBS 3 Hybrid Backup Sync 26.2.0.938

Timelineinfo

10/24/2025 CVE reserved
01/02/2026 +70 days Advisory disclosed
01/02/2026 +0 days VulDB entry created
02/06/2026 +35 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-46
Organization: Pwn2Own 2025
Status: Confirmed

CVE: CVE-2025-62842 (🔒)
GCVE (CVE): GCVE-0-2025-62842
GCVE (VulDB): GCVE-100-339425
EUVD: 🔒

Entryinfo

Created: 01/02/2026 17:19
Updated: 02/06/2026 08:12
Changes: 01/02/2026 17:19 (68), 02/05/2026 20:56 (11), 02/06/2026 08:12 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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