CVE-2026-108892 Linksys CVE debrief

Who should care

Defenders responsible for Linksys E1700 devices, network administrators, and security teams should be aware of this vulnerability and assess their exposure. They should prioritize verifying exposure of Linksys E1700 devices with version 1.0.0.4.003 and assessing the network for potential exploitation attempts. Additionally, they should review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant and logs

Why it matters

A stack-based buffer overflow vulnerability in Linksys E1700 1.0.0.4.003 can be exploited remotely, allowing for potential unauthorized access and disruption of network services. Defenders should prioritize verifying exposure and assessing the network for potential exploitation attempts.

• Potential unauthorized access to the device
• Possible disruption of network services
• Need for verification of device exposure and exploitation attempts
• Priority for vendor remediation guidance

Technical summary

The ssid1MACFilter function of the Mac Filter component in Linksys E1700 1.0.0.4.003 is vulnerable to a stack-based buffer overflow. The vulnerability can be exploited remotely by manipulating the newap_text_%d argument. This could allow for potential unauthorized access and disruption of network services. Defenders should prioritize verifying exposure of Linksys E1700 devices with version 1.0.0.4.003 and assessing the network for potential exploitation attempts. The vulnerability affects the Mac Filter component, and its exploitation could lead to security breaches.

Defensive priority

Defenders should prioritize verifying exposure of Linksys E1700 devices with version 1.0.0.4.003 and assessing the network for potential exploitation attempts.

Recommended defensive actions

• Verify exposure of Linksys E1700 devices with version 1.0.0.4.003
• Assess the network for potential exploitation attempts
• Monitor for vendor response or remediation guidance
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details about the vulnerability, its impact, and potential exploitation. However, the vendor did not respond to the disclosure, and there is limited information about affected versions and remediation.

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.