CVE-2023-27229Public exploitNetwork attack vector

Command execution via unsanitized upBw parameter

Published Mar 28, 2023 · Updated Feb 18, 2025

Command injection in TOTOlink A7100RU firmware 7.4cu.2313_B20191024 allows remote attackers to execute commands through the upBw parameter. The setWanIeCfg handler passes upBw through Uci_Set_Str_By_Idx and Uci_Set_Str, formats it with snprintf, then sends it to cstesystem and execv without neutralization. CISA's assessment requires no privileges or user interaction, although the published request carries a session cookie; successful injection can obtain a root shell.

CVSS severity9.8
Critical
EPSS probability2.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in TOTOlink A7100RU firmware 7.4cu.2313_B20191024 allows remote attackers to execute commands through the upBw parameter. The setWanIeCfg handler passes upBw through Uci_Set_Str_By_Idx and Uci_Set_Str, formats it with snprintf, then sends it to cstesystem and execv without neutralization. CISA's assessment requires no privileges or user interaction, although the published request carries a session cookie; successful injection can obtain a root shell.

The record

CVE
CVE-2023-27229
Published
Mar 28, 2023
Updated
Feb 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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
9.8NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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