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Stack-based overflow in Totolink A3002MU QoS rule handler

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

A stack-based buffer overflow in the formIpQoS function of Totolink A3002MU 1.0.0-B20230403.1455 affects its QoS Rule Handler component. Manipulating the addQos/comment/entry_name argument overflows a stack buffer (CWE-121). A remote attacker can trigger it without privileges or user interaction. A public exploit has been disclosed and is linked in the references.

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

Description from the CNA

A security vulnerability has been detected in Totolink A3002MU 1.0.0-B20230403.1455. This affects an unknown function of the file /boafrm/formIpQoS of the component QoS Rule Handler. The manipulation of the argument addQos/comment/entry_name leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00644 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
TOTOLINKA3002MU1.0.0-B20230403.1455—No fix listedCNA
  • A3002MU VendorTOTOLINK Affected 1.0.0-B20230403.1455 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:totolink:a3002mu:*:*:*:*:*:*:*:*——TOTOLINK
  • cpe:2.3:a:totolink:a3002mu:*:*:*:*:*:*:*:* Versions — — ·TOTOLINK

Remediation

The sources list no fixed version for Totolink A3002MU.

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

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-105285
  2. 2026-10-05 Alias added: GHSA-x79h-v8f2-79c8
  3. 2026-10-06 EPSS moved to the below the 50th percentile
  4. 2026-10-21 EPSS moved to the 50th–90th percentile

References

  • 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-2026-79031 TOTOLINK EX200 setWiFiAclAddConfig stack-based buffer overflow CVSS 4.0CRITICAL 10.0
  • TI-2026-79012 Stack-based buffer overflow in TOTOLINK EX200 setStaticDhcpConfig CVSS 4.0CRITICAL 10.0
  • TI-2026-67718 Improper authorization in Totolink A3002MU authentication check CVSS 4.0CRITICAL 10.0
See all 1321 →

Sources