CVE-2026-86157

Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere

Published Sep 29, 2026 CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed
Description
Exposure of privileged IPC functionality in Progress Telerik Fiddler Everywhere before version 8.2.0 allows a local, low-privileged attacker who can modify application launch parameters and persuade a user to start the application to replace the application UI or settings with attacker-controlled content. Successful exploitation could result in disclosure of OAuth authentication tokens, execution of locally accessible programs, or unauthorized modification of application-generated configuration files.

Remediation

Vendor Workaround

Users should verify that Fiddler Everywhere shortcuts have not been modified with additional command-line arguments, verify the configured browser executable path, and avoid using application-generated authentication links when manual authentication is available.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Progress Software
Progress Software progress Telerik Fiddler Everywhere
Vendors & Products Progress Software
Progress Software progress Telerik Fiddler Everywhere
Type Values Removed Values Added
Description Exposure of privileged IPC functionality in Progress Telerik Fiddler Everywhere before version 8.2.0 allows a local, low-privileged attacker who can modify application launch parameters and persuade a user to start the application to replace the application UI or settings with attacker-controlled content. Successful exploitation could result in disclosure of OAuth authentication tokens, execution of locally accessible programs, or unauthorized modification of application-generated configuration files.
Title Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere
Weaknesses CWE-749
References
Metrics cvssV3_1

{'score': 5.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ProgressSoftware
Published
Updated
Sep 30, 2026, 3:28 PM
Reserved
Sep 5, 2026, 9:09 AM
Status
Awaiting Analysis
Published
Sep 29, 2026, 7:16 AM
Modified
Sep 30, 2026, 4:19 PM