CVE-2019-25237Public exploitNetwork attack vector

Administrator access via unchecked user role update

Published Dec 24, 2025 · Updated Dec 24, 2025

Incorrect authorization in V-SOL GPON/EPON OLT Platform 2.03 allows remote authenticated users to gain administrative access. The user-management handler at /action/user.html accepts a crafted HTTP POST with user_role_mod set to 1 and applies the requested administrator role without validating the caller's authority. A normal account and access to the web management interface are sufficient; successful exploitation grants the administrative control available on the OLT.

CVSS severity8.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in V-SOL GPON/EPON OLT Platform 2.03 allows remote authenticated users to gain administrative access. The user-management handler at /action/user.html accepts a crafted HTTP POST with user_role_mod set to 1 and applies the requested administrator role without validating the caller's authority. A normal account and access to the web management interface are sufficient; successful exploitation grants the administrative control available on the OLT.

The record

CVE
CVE-2019-25237
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
Guangzhou V-Solution Telecommunication Technology Co., Ltd.
Product
V-SOL GPON/EPON OLT Platform
Classifications
CWE-863, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.03

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Guangzhou V-Solution Telecommunication Technology Co., Ltd. · V-SOL GPON/EPON OLT Platformversion=2.03

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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