CVE-2025-62843
Qnap Qurouter 2.6.0.239 … 2.6.2.007
Raw vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:U/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:XSummary
CVE-2025-62843 is a low-severity Improper Restriction of Communication Channel to Intended Endpoints (CWE-923) vulnerability in Qnap Qurouter. Its CVSS base score is 0.9 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Hardware Additions (T1200); ranked at the 20th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to IA-3 (Device Identification and Authentication) and SC-41 (Port and I/O Device Access) — see the control section below for these in your framework.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208895
Vulnerability Data
An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint. We…
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have already fixed the vulnerability in the following version: QuRouter 2.6.3.009 and later
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Physical access requirement directly maps to Hardware Additions (T1200) where an attacker with physical access exploits the improper channel restriction to gain intended endpoint privileges.
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
Mitigating Controls (NIST 800-53 r5) AI
Directly blocks the physical access prerequisite required to exploit the improper endpoint channel restriction.
Requires device identification and authentication so only intended endpoints can communicate, directly mitigating CWE-923.
Restricts physical port and I/O device access to enforce communication only with authorized endpoints on the device.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Network segmentation and access controls directly enforce communication only with intended endpoints.
Authenticating services/hardware directly prevents communication with unintended endpoints.
Data-in-transit protections commonly include certificate-based endpoint authentication to ensure correct peers.
Documenting authorized flows helps define intended endpoints but does not enforce channel restrictions at runtime.
Protecting identity assertions supports endpoint verification but is narrower than channel restriction.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Secure authentication mechanisms ensure the product communicates only with intended, authenticated endpoints.
Network security controls directly enforce endpoint validation and channel restrictions.
Security of network services includes authentication of endpoints and service-to-service channel protection.
Network segregation reduces exposure but does not itself validate specific endpoints.
Cryptography can protect channels but does not guarantee correct endpoint identity without additional controls.
Application security requirements may specify endpoint validation but do not implement it.