Insecure Initialization in Linksys EA8100 SMB Service
CVE-2026-127277

10CRITICAL

Key Information:

Vendor

Linksys
Status
Ea8100
Vendor
CVE Published:
13 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-127277?

A vulnerability in the SMB Service of the Linksys EA8100 version 1.0.3.216940 has been identified, which stems from improper initialization when manipulating the ANON_ACCESS argument in the script located at etc/init.d/service_smbd.sh. This flaw allows for potential remote attacks, as the exploit has already been made public. The vendor has been notified of this issue but has not provided a response, raising concerns about the security posture of the affected product.

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-2026-127277 - Proof of Concept

References

https://vuldb.com/vuln/436432
vdb-entrytechnical-description
https://vuldb.com/vuln/436432/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-127277
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

geochen (VulDB User)
VulDB CNA Team
.