Unauthenticated Information Disclosure in V-SOL GPON/EPON OLT Platform
CVE-2019-25239

8.7HIGH

Key Information:

Vendor

Guangzhou V-solution Electronic Technology

Status
Gpon/epon Olt Platform
Vendor
CVE Published:
24 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25239?

The V-SOL GPON/EPON OLT Platform version 2.03 is susceptible to an unauthenticated information disclosure vulnerability. This flaw permits attackers to exploit direct object reference to download sensitive configuration files via HTTP GET requests, specifically targeting the usrcfg.conf endpoint. Through this attack vector, unauthorized users can obtain critical configuration data that may facilitate authentication bypass and further system access, severely compromising system integrity and security.

Affected Version(s)

GPON/EPON OLT Platform V2.03.62R_IPv6

GPON/EPON OLT Platform V2.03.54R

GPON/EPON OLT Platform V2.03.52R

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25239 - Proof of Concept

References

https://www.exploit-db.com/exploits/47433
exploit
https://www.vsolcn.com
product
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-55...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LiquidWorm as Gjoko Krstic of Zero Science Lab
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CVE-2019-25239 : Unauthenticated Information Disclosure in V-SOL GPON/EPON OLT Platform