Hiseeu C90 5.7.15 UART Bootloader permission

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Hiseeu C90 5.7.15. This affects an unknown function of the component UART Bootloader. Executing a manipulation can lead to permission. This vulnerability is handled as CVE-2026-36742. The physical device can be targeted for the attack. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Hiseeu C90 5.7.15. This vulnerability affects an unknown part of the component UART Bootloader. The manipulation with an unknown input leads to a permission vulnerability. The CWE definition for the vulnerability is CWE-275. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Hiseeu C90 v5.7.15 is vulnerable to Insecure Permissions. The UART bootloader is accessible when battery is disconnected (hidden/debug mode).

The advisory is available at github.com. This vulnerability was named CVE-2026-36742 since 04/06/2026. The exploitation appears to be difficult. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/13/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

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

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.4
VulDB Temp Score: 6.2
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: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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

04/06/2026 CVE reserved
05/13/2026 +37 days Advisory disclosed
05/13/2026 +0 days VulDB entry created
05/13/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2026-36742 (🔒)
GCVE (CVE): GCVE-0-2026-36742
GCVE (VulDB): GCVE-100-363646

Entryinfo

Created: 05/13/2026 18:26
Changes: 05/13/2026 18:26 (53)
Complete: 🔍
Cache ID: 216::103

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