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PatchSiren cyber security CVE debrief

CVE-2026-9534 Totolink CVE debrief

A command injection vulnerability in Totolink CA750-PoE 6.2c.510 allows remote attackers to execute arbitrary OS commands via the PIN parameter in the setWiFiWpsConfig function of /cgi-bin/cstecgi.cgi. The vulnerability has a LOW CVSS 4.0 score (2.1) with network attack vector, low attack complexity, and low privileges required. The exploit has been publicly disclosed.

Vendor
Totolink
Product
CA750-PoE
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-26
Original CVE updated
2026-07-23
Advisory published
2026-05-26
Advisory updated
2026-07-23

Who should care

Network administrators managing Totolink CA750-PoE wireless access points; security teams responsible for IoT device security; organizations using Totolink networking equipment in production environments

Technical summary

The setWiFiWpsConfig function in /cgi-bin/cstecgi.cgi of Totolink CA750-PoE firmware version 6.2c.510 fails to properly sanitize the PIN parameter, allowing OS command injection. An attacker with low privileges can send a crafted HTTP request to execute arbitrary commands on the device. The vulnerability is remotely exploitable without user interaction.

Defensive priority

low

Recommended defensive actions

  • Restrict administrative interface access to trusted networks only
  • Disable WPS functionality if not required
  • Monitor for suspicious requests to /cgi-bin/cstecgi.cgi containing unusual PIN parameter values
  • Apply vendor firmware updates when available
  • Consider network segmentation for IoT device management interfaces

Evidence notes

Vulnerability disclosed via VulDB with public exploit reference. CVE status is Deferred in NVD. CVSS 4.0 vector indicates network-accessible attack with low privileges required.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9534 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9534

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9534 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9534

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.