Description
A vulnerability was identified in Linksys E8450 1.2.00.360516. Affected is the function strcpy of the file /www/cgi-bin/portal.cgi. Such manipulation of the argument hidden_timezone leads to stack-based buffer overflow. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Published: 2026-11-02
Score: 10 Critical
EPSS: n/a
KEV: No
Impact: Remote code execution
Action: Immediate Patch
AI Analysis

Impact

A stack-based buffer overflow exists in Linksys E8450 firmware 1.2.00.360516, triggered by the strcpy call in /www/cgi-bin/portal.cgi when the hidden_timezone argument is manipulated. This flaw permits an attacker to overflow a buffer on the call stack, potentially gaining arbitrary code execution on the device. The vulnerability is classified under CWE-119 and CWE-121.

Affected Systems

The flaw affects the Linksys E8450 router, specifically firmware version 1.2.00.360516. Any devices running this firmware and exposing the /www/cgi-bin/portal.cgi endpoint are at risk.

Risk and Exploitability

The CVSS score of 10 indicates critical severity. No EPSS data is available, so the exact exploitation probability is unknown. The vulnerability is not yet listed in the CISA KEV catalog. The attack vector is remote, likely through HTTP requests to the portal.cgi entry point. Because the vendor has not released a patch or response, the risk remains high and an attacker can potentially compromise device configuration and network traffic.

Generated by OpenCVE AI on November 2, 2026 at 02:21 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade the router to a firmware version that includes the portal.cgi fix if one is available from Linksys.
  • If upgrades are not immediately possible, block or filter HTTP requests to /www/cgi-bin/portal.cgi using firewall or access control lists to prevent exploitation via the hidden_timezone parameter.
  • Disable remote web management or restrict it to trusted networks to reduce the attack surface exposed to the vulnerable endpoint.

Generated by OpenCVE AI on November 2, 2026 at 02:21 UTC.

Tracking

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Advisories

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History

Mon, 02 Nov 2026 01:15:00 +0000

Type Values Removed Values Added
Description A vulnerability was identified in Linksys E8450 1.2.00.360516. Affected is the function strcpy of the file /www/cgi-bin/portal.cgi. Such manipulation of the argument hidden_timezone leads to stack-based buffer overflow. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Title Linksys E8450 portal.cgi strcpy stack-based overflow
First Time appeared Linksys
Linksys e8450 Firmware
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:o:linksys:e8450_firmware:*:*:*:*:*:*:*:*
Vendors & Products Linksys
Linksys e8450 Firmware
References
Metrics cvssV2_0

{'score': 10, 'vector': 'AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 10, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 10, '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'}

Subscriptions

Linksys E8450 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-11-02T01:00:22.303Z

Reserved: 2026-11-01T07:58:12.074Z

Link: CVE-2026-120283

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-02T01:17:27.500

Modified: 2026-11-02T01:17:27.500

Link: CVE-2026-120283

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-02T02:30:06Z

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer

  • CWE-121

    Stack-based Buffer Overflow