---
title: "CVE-2025-62841: HBS 3 Hybrid Backup Sync - Hardcoded Credentials"
description: "HBS 3 Hybrid Backup Sync and Hybrid Backup Sync contain a hardcoded cryptographic key vulnerability caused by embedded static keys, letting remote attackers compromise system security, exploit requires no special conditions."
url: https://panop.io/threat-heartbeat/CVE-2025-62841/
---

# CVE-2025-62841 HBS 3 Hybrid Backup Sync - Hardcoded Credentials

HBS 3 Hybrid Backup Sync and Hybrid Backup Sync contain a hardcoded cryptographic key vulnerability caused by embedded static keys, letting remote attackers compromise system security, exploit requires no special conditions.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.24% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2025-62841)

## Details

Type

Hardcoded Credentials

Impact

Weak Cryptography

CVSS vector

CVSS:4.0/AV:A/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:X/V:X/RE:X/U:X

Published

29 October 2026

Updated

31 October 2026

Weakness

[CWE-321](https://cwe.mitre.org/data/definitions/321.html)

## Vendor fix

Update to version 26.4.0.521 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2025-62841](https://nvd.nist.gov/vuln/detail/CVE-2025-62841)
- [https://www.qnap.com/en/app-release-notes?keyword=HBS%203&app=HybridBackup&product-line=nas](https://www.qnap.com/en/app-release-notes?keyword=HBS%203&app=HybridBackup&product-line=nas)
- [https://www.qnap.com/en/app-release-notes?keyword=Hybrid&app=HybridBackup&product-line=nas](https://www.qnap.com/en/app-release-notes?keyword=Hybrid&app=HybridBackup&product-line=nas)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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