TOTOLINK EX1200L 9.3.5u.6146_B20201023 /cgi-bin/cstecgi.cgi setWizardCfg null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.42+

Summaryinfo

A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200L 9.3.5u.6146_B20201023. This vulnerability affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2026-75013. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in TOTOLINK EX1200L 9.3.5u.6146_B20201023. It has been declared as critical. Affected by this vulnerability is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The advisory is shared at gist.github.com. This vulnerability is known as CVE-2026-75013. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at gist.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.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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

08/17/2026 Advisory disclosed
08/17/2026 +0 days VulDB entry created
08/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2026-75013 (🔒)
GCVE (CVE): GCVE-0-2026-75013
GCVE (VulDB): GCVE-100-391273
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/17/2026 15:16
Changes: 08/17/2026 15:16 (55)
Complete: 🔍
Submitter: yuxin_wang
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #876033: Totolink EX1200L Firmware V9.3.5u.6146_B20201023 NULL Pointer Dereference (by yuxin_wang)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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