Hardcoded Cryptographic Keys and Weak IV Generation in linqi

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Summary

CVECVE-2026-11347
StatePUBLISHED
Assignerlinqi
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-05 11:16:34 UTC
Updated2026-06-05 16:07:31 UTC
DescriptionThe linqi application contains hardcoded cryptographic keys. Additionally, the application uses a weak algorithm with a limited ASCII charset to dynamically generate Initialization Vectors (IVs) for AES/CBC encryption, making known-plaintext attacks feasible. An attacker with local access can leverage these vulnerabilities to decrypt sensitive obfuscated strings, including ConnectionString values containing database credentials from appsettings.json.

Risk And Classification

Primary CVSS: v4.0 8.5 HIGH from 86c47df7-7d28-48da-920a-6423c52fd3da

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-321 | CWE-338 | CWE-321 CWE-321: Use of Hard-coded Cryptographic Key | CWE-338 CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

VersionSourceTypeScoreSeverityVector
4.086c47df7-7d28-48da-920a-6423c52fd3daSecondary8.5HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.5HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linqi GmbH Linqi affected 1.4.8.5 custom Not specified

References

ReferenceSourceLinkTags
linqi.help/en/reference/security/security-advisories 86c47df7-7d28-48da-920a-6423c52fd3da linqi.help
linqi.help/en/reference/security/security-advisories MITRE linqi.help
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Ianis BERNARD from NATO Cyber Security Centre (NCSC) (en)

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