CVE-2026-7123Public exploitNetwork attack vector

Remote command execution via unsanitized IPTV setting

Published Apr 27, 2026 · Updated Apr 27, 2026

OS command injection in TOTOLINK A8000RU 7.1cu.643_b20200521 allows remote attackers to execute commands through the CGI handler. The setIptvCfg path reads the igmpVer request value, formats it into a command string, and passes it through CsteSystem to execv without rejecting command syntax. The published request includes a session cookie, but the official assessment rates privileges as none; commands run with the CGI service authority.

CVSS severityUnavailable
Unscored
EPSS probability1.77%
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 A8000RU 7.1cu.643_b20200521 allows remote attackers to execute commands through the CGI handler. The setIptvCfg path reads the igmpVer request value, formats it into a command string, and passes it through CsteSystem to execv without rejecting command syntax. The published request includes a session cookie, but the official assessment rates privileges as none; commands run with the CGI service authority.

The record

CVE
CVE-2026-7123
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
TOTOLINK
Product
A8000RU
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record 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=7.1cu.643_b20200521

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · A8000RUversion=7.1cu.643_b20200521

Published CVSS scores

8.9INCIBE-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Command Injection
T1059.004Unix Shell

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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