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CVE-2026-86157

Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere

5.6 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.12%Unchanged since Sep 29, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.6

Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere

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.

Record
CVE-2026-86157
CVSS 3.1
5.6 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
Weakness
CWE-749
Updated
2026-11-02
EUVDEUVD-2026-88648 5.6

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.

Record
EUVD-2026-88648
CVSS 3.1
5.6 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-299j-hfrq-4753 5.6

Exposure of privileged IPC functionality in Progress Telerik Fiddler Everywhere before version 8...

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.

Record
GHSA-299j-hfrq-4753
CVSS 3.1
5.6 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
Weakness
CWE-749
Updated
2026-11-02
NVD 5.6

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.

Record
CVE-2026-86157
CVSS 3.1
5.6 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
Weakness
CWE-749
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-86157 is a medium vulnerability (CVSS 5.6) in Progress Software Progress® Telerik® Fiddler® Everywhere, published September 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.

References

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