Hy511 Firmware
CVE-2025-65212
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
An issue was discovered in NJHYST HY511 POE core before 2.1 and plugins before 0.1. The vulnerability stems from the device's insufficient cookie verification, allowing an attacker to directly request the configuration file address and download the core configuration file without logging into the device management backend. By reading the corresponding username and self-decrypted MD5 password in the core configuration file, the attacker can directly log in to the backend, thereby bypassing the front-end backend login page.
AnalysisAI
NJHYST HY511 POE core (before 2.1) allows unauthenticated download of the configuration file containing usernames and self-decrypted MD5 passwords, due to insufficient cookie verification. PoC available.
Technical ContextAI
The device does not properly verify session cookies (CWE-565) on the configuration file download endpoint. An attacker can request the config file directly without authentication, obtaining usernames and weakly protected (MD5-hashed) passwords that can be easily cracked.
RemediationAI
Update to HY511 POE core 2.1 or later. Change all credentials after updating. Restrict management access to a dedicated VLAN.
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External POC / Exploit Code
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