JVNVU#99009004
Multiple vulnerabilities in Contec FLEXLAN series

Overview

FLEXLAN series provided by Contec Co., Ltd. contains multiple vulnerabilities.

Products Affected

CVE-2026-82762, CVE-2026-82763, CVE-2026-82764, CVE-2026-82765

• FX5000 series
  • FXA5000 versions prior to 1.12.00
  • FXA5020 versions prior to 1.12.00
  • FXA5020-[][] versions prior to 1.12.00
  • FXE5000 versions prior to 1.12.00
  • FXE5000-[][] versions prior to 1.12.00
  • FXS5000-[][] versions prior to 1.12.00
  • FXS5021 versions prior to 1.12.00
• FX4000 series
  • FXE4000 versions prior to 1.14.00
  • FXE4000-WP versions prior to 1.14.00
  • FXS4000 versions prior to 1.14.00
  • FXS4020 versions prior to 1.14.00
• FX3000 series
  • FXA3000 versions prior to 1.20
  • FXA3000-[][] versions prior to 1.20
  • FXA3020 versions prior to 1.20
  • FXA3020-[][] versions prior to 1.20
  • FXA3200 versions prior to 1.20
  • FXA3200-[][] versions prior to 1.20
  • FXE3000 versions prior to 1.20
  • FXE3000-[][] versions prior to 1.20
  • FXE3000-WP versions prior to 1.20
  • FXS300[]-CN versions prior to 1.20

• SGA1000 versions prior to 1.02

• RP-WAH-SR Series
  • RP-WAH-SR1 versions prior to 1.03
  • RP-WAH-SR2 versions prior to 1.03
  • RP-WAH-SR12 versions prior to 1.02
  • RP-WAH-SR22 versions prior to 1.02

• EC1000 series
  • ECE1000 versions prior to 1.02
  • ECE1020 versions prior to 1.02
  • ECS1020 versions prior to 1.02

Description

FLEXLAN series provided by Contec Co., Ltd. contains multiple vulnerabilities listed below.

• OS command injection (CWE-78)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N Base Score 8.7
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Base Score 8.8
  • CVE-2026-82762, CVE-2026-82766
• Cross-site scripting (CWE-79)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N Base Score 4.8
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Base Score 5.4
  • CVE-2026-82763, CVE-2026-82769, CVE-2026-82771
• Cross-site request forgery (CWE-352)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Base Score 5.1
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Base Score 4.3
  • CVE-2026-82764
• Path traversal (CWE-23)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Base Score 8.6
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Base Score 8.1
  • CVE-2026-82765, CVE-2026-82768
• Cross-site scripting (CWE-79)
  • CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N Base Score 4.8
  • CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Base Score 5.2
  • CVE-2026-82767
• Buffer overflow (CWE-120)
  • CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N Base Score 8.7
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Base Score 8.8
  • CVE-2026-82770, CVE-2026-82772

Impact

• An arbitrary OS command may be executed by an attacker who can log in to the product (CVE-2026-82762, CVE-2026-82766).
• An arbitrary script may be executed on a logged-in user's web browser (CVE-2026-82763, CVE-2026-82767, CVE-2026-82769, CVE-2026-82771).
• If a user views a specially crafted page while logged in to the affected product, unintended operations may be performed (CVE-2026-82764).
• Arbitrary files on the server may be viewed and/or altered by an attacker who can access the product via FTP (CVE-2026-82765, CVE-2026-82768).
• If a remote attacker sends a specially crafted request to the product's web service, an arbitrary program may be executed (CVE-2026-82770, CVE-2026-82772).

Solution

Update the firmware
Update the firmware to the latest version according to the information provided by the developer.