Vulnerability in Progress Software Progress® Telerik® Fiddler® Everywhere
CVE-2026-86157
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-86157?
- CVE-2026-86157 is a medium-severity vulnerability in Progress Software Progress® Telerik® Fiddler® Everywhere, classified under CWE-749. CVSS score: 5.6/10. Published 2026-09-29.
- How severe is CVE-2026-86157?
- Medium severity. CVSS v3 base score is 5.6 out of 10.