# CVE-2026-127277: Linksys EA8100 SMB Service service_smbd.sh initialization

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

A security flaw has been discovered in Linksys EA8100 1.0.3.216940. The affected element is an unknown function of the file etc/init.d/service_smbd.sh of the component SMB Service. Performing a manipulation of the argument ANON_ACCESS results in improper initialization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. 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

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-665

## Exploit evidence

- exploit: https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-5-smb-anonymous-access-mapped-to-the-admin-account-when-anonymous-access-is-enabled (CNA: VulDB)

## References

- https://vuldb.com/vuln/436432 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/436432/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-127277 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1040999 (CNA: VulDB; third-party-advisory)

- https://github.com/geo-chen/oss/blob/main/Linksys.md#finding-5-smb-anonymous-access-mapped-to-the-admin-account-when-anonymous-access-is-enabled (CNA: VulDB; exploit)

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

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-127277; retrieved 2026-11-13; source updated 2026-11-13

Revision: 9c7c0d67abc94deea2b3bd0cadb2b0a38a18e59232fe4906b56fa0a38a1800fa

Canonical: https://y2.dev/cve/CVE-2026-127277

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