CVE-2025-28031Public exploitNetwork attack vector

Telnet access via hard-coded password

Published Apr 22, 2025 · Updated Apr 22, 2025

Use of a hard-coded password in TOTOLINK A810R 4.1.2cu.5182_B20201026 allows remote attackers to access the Telnet service. The product.ini configuration stores a fixed Telnet password rather than a device-specific secret, exposing the same credential in affected firmware. Network access to Telnet and knowledge of the embedded password are required; successful authentication grants access under the associated Telnet account.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of a hard-coded password in TOTOLINK A810R 4.1.2cu.5182_B20201026 allows remote attackers to access the Telnet service. The product.ini configuration stores a fixed Telnet password rather than a device-specific secret, exposing the same credential in affected firmware. Network access to Telnet and knowledge of the embedded password are required; successful authentication grants access under the associated Telnet account.

The record

CVE
CVE-2025-28031
Published
Apr 22, 2025
Updated
Apr 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-259, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-259Use of Hard-coded Password
T1078Valid Accounts

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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