Missing Authentication Vulnerability in Linksys EA8100 JNAP API
CVE-2026-127273

5.3MEDIUM

Key Information:

Vendor

Linksys
Status
Ea8100
Vendor
CVE Published:
12 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127273?

The Linksys EA8100 contains a vulnerability within the JNAP API functions, specifically GetWANStatus, GetWANStatus3, and IsAdminPasswordDefault. This vulnerability permits attackers to gain unauthorized access due to the absence of proper authentication. The exploit can be executed remotely, which raises significant security concerns. Additionally, the responsible vendor has not yet provided a response to the reported vulnerability, indicating a lapse in proactive security measures. Users of the affected version are urged to assess the risks and implement necessary security precautions.

Affected Version(s)

EA8100 1.0.3.216940

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-127273 - Proof of Concept

References

https://vuldb.com/vuln/436428
vdb-entrytechnical-description
https://vuldb.com/vuln/436428/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-127273
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

geochen (VulDB User)
VulDB CNA Team
.