TOTOLINK A7000R up to 9.1.0u.6115 /cgi-bin/cstecgi.cgi setWiFiEasyGuestCfg ssid5g stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in TOTOLINK A7000R up to 9.1.0u.6115. The impacted element is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument ssid5g leads to stack-based overflow. This vulnerability is documented as CVE-2026-6168. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in TOTOLINK A7000R up to 9.1.0u.6115. It has been rated as critical. Affected by this issue is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid5g with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-6168. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-21893). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/12/2026 Advisory disclosed
04/12/2026 +0 days VulDB entry created
04/13/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2026-6168 (🔒)
GCVE (CVE): GCVE-0-2026-6168
GCVE (VulDB): GCVE-100-357056
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/12/2026 22:54
Updated: 04/13/2026 13:09
Changes: 04/12/2026 22:54 (56), 04/13/2026 13:09 (1)
Complete: 🔍
Submitter: DLChen
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #797193: TOTOLINK A7000R <=V9.1.0u.6115 Stack-based Buffer Overflow (by DLChen)

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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