CVE-2026-86157

5.6 mediumEPSS 0.1%

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.

CVSS 3.1: 5.6CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)
CWE: CWE-749
Published: 2026-09-29
Modified: 2026-09-30
Record from: the NVD, synced 2026-10-19

References

https://www.telerik.com/fiddler/fiddler-everywhere/documentation/knowledge-base/kb-security-exposed-dangerous-method-or-function-cve-2026-86157

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