# CVE-2026-127275: Linksys EA8100 JNAP API ui_server.lua SetUnsecuredWiFiWarning missing authentication

Status: published. Published: 2026-11-12. Updated: 2026-11-13.

A vulnerability was determined in Linksys EA8100 1.0.3.216940. This issue affects the function SetRemoteSetting/SetUnsecuredWiFiWarning of the file ui_server.lua of the component JNAP API. This manipulation of the argument isEnabled/enabled causes missing authentication. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linksys / EA8100: 1.0.3.216940 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 10 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P; source: CNA: VulDB

- CVSS 3.1: 10 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 10 (critical); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 10 (critical); AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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; source: NVD: cna@vuldb.com

- CVSS 3.1: 10 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H; source: NVD: cna@vuldb.com

- CVSS 2.0: 10 (high); AV:N/AC:L/Au:N/C:C/I:C/A:C; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: 0.75% as of 2026-11-13; percentile 55.66%

- SSVC: exploitation poc; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-306, CWE-287

## Exploit evidence

- exploit: https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-3-unauthenticated-write-access-to-remote-management-pairing-state-and-unsecured-wifi-warning-flag (CNA: VulDB)

## References

- https://vuldb.com/vuln/436430 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/436430/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-127275 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1040997 (CNA: VulDB; third-party-advisory)

- https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-3-unauthenticated-write-access-to-remote-management-pairing-state-and-unsecured-wifi-warning-flag (CNA: VulDB; exploit)

- https://www.linksys.com/ (CNA: VulDB; product)

- https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-3-unauthenticated-write-access-to-remote-management-pairing-state-and-unsecured-wifi-warning-flag (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-127275 (cna@vuldb.com)

- https://vuldb.com/submit/1040997 (cna@vuldb.com)

- https://vuldb.com/vuln/436430 (cna@vuldb.com)

- https://vuldb.com/vuln/436430/cti (cna@vuldb.com)

- https://www.linksys.com/ (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-127275; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-127275; retrieved 2026-11-14; source updated 2026-11-13

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-127275; retrieved 2026-11-13; source updated Not reported

Revision: 859ac3bdb6dcef2022825dedf8d7ec6883ab231df30c956dca7c5ab38f89012a

Canonical: https://y2.dev/cve/CVE-2026-127275

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