CVE-2026-9432: OS Command Injection in Totolink A8000RU
CVE-2026-9432 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7.1cu.643_b20200521. It affects the setWiFiAdvancedCfg function within the /cgi-bin/cstecgi.cgi web management interface. An attacker can remotely exploit this flaw by manipulating the bgProtection argument, leading to arbitrary OS command execution. The vulnerability has a high CVSS 4.0 score of 9.3, indicating severe impact. Although the exploit code has been publicly released, there is no official patch or remediation guidance available from the vendor at this time.
AI Analysis
Technical Summary
This vulnerability exists in the web management interface of Totolink A8000RU firmware 7.1cu.643_b20200521, specifically in the setWiFiAdvancedCfg function of /cgi-bin/cstecgi.cgi. By manipulating the bgProtection parameter, an unauthenticated remote attacker can perform OS command injection, potentially executing arbitrary commands on the device. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the device is not a cloud service, so remediation depends on vendor action or user mitigation.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device without authentication. This can lead to full compromise of the device, including unauthorized access, control over network traffic, and potential pivoting to other internal systems. The vulnerability is critical with a CVSS 4.0 score of 9.3, reflecting high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is provided, users should restrict access to the device's web management interface from untrusted networks and monitor for unusual activity. Applying any future firmware updates from Totolink addressing this issue is strongly recommended once available.
CVE-2026-9432: OS Command Injection in Totolink A8000RU
Description
CVE-2026-9432 is a critical OS command injection vulnerability in the Totolink A8000RU router firmware version 7.1cu.643_b20200521. It affects the setWiFiAdvancedCfg function within the /cgi-bin/cstecgi.cgi web management interface. An attacker can remotely exploit this flaw by manipulating the bgProtection argument, leading to arbitrary OS command execution. The vulnerability has a high CVSS 4.0 score of 9.3, indicating severe impact. Although the exploit code has been publicly released, there is no official patch or remediation guidance available from the vendor at this time.
CVSS v4.0
Score 9.3critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in the web management interface of Totolink A8000RU firmware 7.1cu.643_b20200521, specifically in the setWiFiAdvancedCfg function of /cgi-bin/cstecgi.cgi. By manipulating the bgProtection parameter, an unauthenticated remote attacker can perform OS command injection, potentially executing arbitrary commands on the device. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No official patch or vendor advisory is currently available, and the device is not a cloud service, so remediation depends on vendor action or user mitigation.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device without authentication. This can lead to full compromise of the device, including unauthorized access, control over network traffic, and potential pivoting to other internal systems. The vulnerability is critical with a CVSS 4.0 score of 9.3, reflecting high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is provided, users should restrict access to the device's web management interface from untrusted networks and monitor for unusual activity. Applying any future firmware updates from Totolink addressing this issue is strongly recommended once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T07:07:22.122Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a13eec0a5ae1af1aa6777d0
Added to database: 05/25/2026, 06:40:00 UTC
Last enriched: 06/01/2026, 20:55:58 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 94
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.