CVE-2026-7155Public exploitNetwork attack vector

Command execution via unsanitized password interpolation

Published Apr 27, 2026 · Updated Apr 28, 2026

Command injection in TOTOLINK A8000RU 7.1cu.643_b20200521 allows remote attackers to execute OS commands via crafted requests. In /cgi-bin/cstecgi.cgi, setLoginPasswordCfg passes admpass through Uci_Set_Str, which interpolates the value into a command executed by CsteSystem without neutralizing shell syntax. Exploitation requires access to the management interface; the CNA reports no authentication requirement, but the published demonstration includes a session cookie.

CVSS severityUnavailable

Unscored

EPSS probability3.25%

Next 30 days · Oct 19, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2026-7155
Published: Apr 27, 2026
Updated: Apr 28, 2026

Vendor: TOTOLINK
Product: A8000RU
Classifications: CWE-77, CWE-78, T1059.004

Attack vector: network
Privileges: unauthenticated

Timeline

How it unfolded

Apr 27, 2026CVE publishedPublication date reported by the CVE source.
Apr 28, 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.

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

9.8VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

10.0VulDBAV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

8.9GitHub Advisory DatabaseCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

9.3VulDBCVSS: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

9.8VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026

Latest reporting daySep 28, 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')

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

T1059.004Unix Shell

Public exploit references

A8000RU setLoginPasswordCfg command-injection proof of conceptproof of concept · demonstrated

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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