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TI-2026-79031 Aliases CVE-2026-114383GHSA-5mwr-gvhc-9w4r

TOTOLINK EX200 setWiFiAclAddConfig stack-based buffer overflow

Priority HIGH 82CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

TOTOLINK EX200 version 5.2.3c.7200 contains a stack-based buffer overflow in the setWiFiAclAddConfig function of /cgi-bin/cstecgi.cgi in the wireless.so component. Manipulating the macAddress argument triggers the overflow, and an attacker can exploit it remotely, with a public exploit available. The CVSS 4.0 base score is 10.0 (Critical). CWE-121 and CWE-119 apply.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A weakness has been identified in TOTOLINK EX200 5.2.3c.7200. This impacts the function setWiFiAclAddConfig of the file /cgi-bin/cstecgi.cgi of the component wireless.so. This manipulation of the argument macAddress causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00653 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TOTOLINKEX2005.2.3c.7200—No fix listedCNA
  • EX200 VendorTOTOLINK Affected 5.2.3c.7200 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:o:totolink:ex200_firmware:*:*:*:*:*:*:*:*——TOTOLINK
  • cpe:2.3:o:totolink:ex200_firmware:*:*:*:*:*:*:*:* Versions — — ·TOTOLINK

Remediation

No fix is listed for TOTOLINK EX200 5.2.3c.7200. Restrict access to the device's web management interface, and check the vendor for an updated firmware release.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114383
  2. 2026-10-22 Alias added: GHSA-5mwr-gvhc-9w4r
  3. 2026-10-28 CISA SSVC decision points changed
  4. 2026-10-28 Priority changed: MEDIUM → HIGH

References

Exploit 1

Other 1

  • TI-2023-25090 An issue in TOTOLINK A3700R v.9.1.2u.6165_20211012 allows a remote attacker to execute… CVSS 3.1CRITICAL 9.8
  • TI-2026-80926 TOTOLINK A950RG stack-based overflow in infostat.cgi via CONTENT_LENGTH CVSS 4.0CRITICAL 10.0
  • TI-2026-79142 Command injection in TOTOLINK A950RG UploadCustomModule function CVSS 4.0CRITICAL 10.0
  • TI-2026-79012 Stack-based buffer overflow in TOTOLINK EX200 setStaticDhcpConfig CVSS 4.0CRITICAL 10.0
  • TI-2026-67719 Stack-based overflow in Totolink A3002MU QoS rule handler CVSS 4.0CRITICAL 10.0
  • TI-2026-67718 Improper authorization in Totolink A3002MU authentication check CVSS 4.0CRITICAL 10.0
See all 1317 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences