CVE-2025-28035Network attack vector

Unauthenticated command execution via NoticeUrl injection

Published Apr 22, 2025 · Updated Apr 23, 2025

OS command injection in TOTOLINK A830R firmware 4.1.2cu.5182_B20201102 allows remote attackers to execute commands without authentication. The setNoticeCfg function uses the attacker-controlled NoticeUrl parameter in an operating-system command without neutralizing command syntax. A network request reaches the function before authentication, granting command execution with the firmware service's privileges and allowing device takeover.

CVSS severity9.8
Critical
EPSS probability1.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TOTOLINK A830R firmware 4.1.2cu.5182_B20201102 allows remote attackers to execute commands without authentication. The setNoticeCfg function uses the attacker-controlled NoticeUrl parameter in an operating-system command without neutralizing command syntax. A network request reaches the function before authentication, granting command execution with the firmware service's privileges and allowing device takeover.

The record

CVE
CVE-2025-28035
Published
Apr 22, 2025
Updated
Apr 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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

9.8CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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