Qianniao QN-L23PA0904 20250721.1640 Firmware Update iu.sh backdoor

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.09

Summaryinfo

A vulnerability was found in Qianniao QN-L23PA0904 20250721.1640. It has been rated as critical. This impacts an unknown function of the file iu.sh of the component Firmware Update Handler. The manipulation leads to backdoor. This vulnerability is referenced as CVE-2026-30603. It is possible to launch the attack on the physical device. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Qianniao QN-L23PA0904 20250721.1640. This issue affects an unknown function of the file iu.sh of the component Firmware Update Handler. The manipulation with an unknown input leads to a backdoor vulnerability. Using CWE to declare the problem leads to CWE-912. The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue in the firmware update mechanism of Qianniao QN-L23PA0904 v20250721.1640 allows attackers to gain root access, install backdoors, and exfiltrate data via supplying a crafted iu.sh script contained in an SD card.

The identification of this vulnerability is CVE-2026-30603 since 03/04/2026. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1588.001 according to MITRE ATT&CK.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.6
VulDB Temp Score: 6.6
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: Backdoor
CWE: CWE-912
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
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

03/04/2026 CVE reserved
04/02/2026 +28 days Advisory disclosed
04/02/2026 +0 days VulDB entry created
04/02/2026 +0 days VulDB entry last update

Sourcesinfo

Status: Not defined

CVE: CVE-2026-30603 (🔒)
GCVE (CVE): GCVE-0-2026-30603
GCVE (VulDB): GCVE-100-354935

Entryinfo

Created: 04/02/2026 19:04
Changes: 04/02/2026 19:04 (53)
Complete: 🔍
Cache ID: 216:158:103

Be aware that VulDB is the high quality source for vulnerability data.

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