Totolink A3300R 17.0.0cu.557_b20221024 /cgi-bin/cstecgi.cgi setUPnPCfg enable command injection

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k4.60

Summaryinfo

A vulnerability described as critical has been identified in Totolink A3300R 17.0.0cu.557_b20221024. Impacted is the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument enable leads to command injection. This vulnerability is listed as CVE-2026-5103. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in Totolink A3300R 17.0.0cu.557_b20221024 and classified as critical. Affected by this issue is the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument enable with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-5103. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

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-2026-17053). If you want to get best quality of vulnerability data, you may have to visit VulDB.

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: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
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

03/29/2026 Advisory disclosed
03/29/2026 +0 days VulDB entry created
03/30/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2026-5103 (🔒)
GCVE (CVE): GCVE-0-2026-5103
GCVE (VulDB): GCVE-100-354128
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/29/2026 19:56
Updated: 03/30/2026 05:17
Changes: 03/29/2026 19:56 (56), 03/30/2026 05:17 (1)
Complete: 🔍
Submitter: LvHW
Cache ID: 216:7C9:103

Submitinfo

Accepted

  • Submit #779140: Totolink A3300R 17.0.0cu.557_b20221024 Command Injection (by LvHW)

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