Access Control Flaw in Tonec Internet Download Manager for Windows
CVE-2026-90493

9.3CRITICAL

Key Information:

Vendor

Tonec

Status
Internet Download Manager
Vendor
CVE Published:
13 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90493?

A local access control vulnerability exists in the Tonec Internet Download Manager for Windows, specifically within the idmwfp.sys file of the kernel driver component. This vulnerability allows an attacker with local access to manipulate permissions improperly. The issue has been made public, highlighting the importance of immediate remediation to secure affected systems. The vendor, Tonec Inc., was notified about this vulnerability but has not responded. Users are advised to apply suitable security measures.

Affected Version(s)

Internet Download Manager 6.42 Build 63

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-90493 - Proof of Concept

References

https://vuldb.com/vuln/403081
vdb-entry
https://vuldb.com/vuln/403081/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90493
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

KnCRJNET (VulDB User)
VulDB CNA Team
.