TOTOLINK CA300-PoE 6.2c.884 /cgi-bin/cstecgi.cgi setWiFiMultipleConfig Key1Str1 buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.6$0-$5k0.84+

Summaryinfo

A vulnerability, which was classified as very critical, was found in TOTOLINK CA300-PoE 6.2c.884. Affected is the function setWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument Key1Str1 can lead to buffer overflow. This vulnerability is tracked as CVE-2026-124057. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability has been found in TOTOLINK CA300-PoE 6.2c.884 and classified as very critical. This vulnerability affects the function setWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument Key1Str1 with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at lavender-bicycle-a5a.notion.site. This vulnerability was named CVE-2026-124057. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. Technical details and also a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/06/2026).

It is possible to download the exploit at lavender-bicycle-a5a.notion.site. 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.

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

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.1
VulDB Temp Score: 8.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

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

11/06/2026 Advisory disclosed
11/06/2026 +0 days VulDB entry created
11/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: lavender-bicycle-a5a.notion.site
Status: Confirmed

CNA: VulDB
CVE: CVE-2026-124057 (🔒)

GCVE (CVE): GCVE-0-2026-124057
GCVE (VulDB): GCVE-100-432112
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/06/2026 20:59
Changes: 11/06/2026 20:59 (55)
Complete: 🔍
Submitter: wxhwxhwxh_mie
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1033754: TOTOLINK CA300-PoE CA300-PoE_Firmware V6.2c.884 Buffer Overflow (by wxhwxhwxh_mie)

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