TOTOLINK CA300-PoE 6.2c.884 /cgi-bin/cstecgi.cgi UploadCustomModule File 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-$5k0.42+

Summaryinfo

A vulnerability was found in TOTOLINK CA300-PoE 6.2c.884. It has been classified as very critical. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument File causes buffer overflow. This vulnerability is registered as CVE-2026-124060. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in TOTOLINK CA300-PoE 6.2c.884. It has been declared as very critical. Affected by this vulnerability is the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument File 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.

It is possible to read the advisory at lavender-bicycle-a5a.notion.site. This vulnerability is known as CVE-2026-124060. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. Technical details and also a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (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.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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-2026-124060 (🔒)

GCVE (CVE): GCVE-0-2026-124060
GCVE (VulDB): GCVE-100-432115
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 #1033757: TOTOLINK CA300-PoE CA300-PoE_Firmware V6.2c.884 Buffer Overflow (by wxhwxhwxh_mie)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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