CVE-2026-6015 Tenda CVE debrief

Who should care

Defenders responsible for Tenda AC9 devices, especially those with firmware version 15.03.02.13, should assess their exposure and consider applying patches or updates. Network administrators and security teams should verify the network configuration and access controls for these devices.

Why it matters

This vulnerability allows for a remote stack-based buffer overflow attack on Tenda AC9 devices with firmware version 15.03.02.13, impacting the formQuickIndex function of the /goform/QuickIndex file. Defenders should verify exposure, assess network configuration, and consider applying patches or updates.

• Verify exposure of Tenda AC9 devices with firmware version 15.03.02.13.
• Assess network configuration and access controls for Tenda AC9 devices.
• Consider applying patches or updates if available from the vendor.
• Monitor for potential remote attacks exploiting this vulnerability.

Technical summary

The vulnerability impacts the formQuickIndex function of the /goform/QuickIndex file in the Tenda AC9 device with firmware version 15.03.02.13. The manipulation of the PPPOEPassword argument in a POST request can lead to a stack-based buffer overflow, allowing for a remote attack. Defenders should prioritize verifying exposure of Tenda AC9 devices with firmware version 15.03.02.13, especially those accessible remotely. The vulnerability allows for a remote stack-based buffer overflow attack on Tenda AC9 devices with firmware version 15.03.02.13.

Defensive priority

Defenders should prioritize verifying exposure of Tenda AC9 devices with firmware version 15.03.02.13, especially those accessible remotely.

Recommended defensive actions

• Verify Tenda AC9 devices with firmware version 15.03.02.13 for exposure, especially those accessible remotely.
• Assess the network configuration and access controls for Tenda AC9 devices.
• Consider applying patches or updates if available from the vendor.
• Monitor for potential remote attacks exploiting this vulnerability.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 7.4 and severity of HIGH. The exploit has been disclosed to the public. Defenders should verify the network configuration and access controls for these devices. The CVE Program and NVD provide official records and assessments of the vulnerability.

Sources and 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.