CVE-2026-86157Hinoki check available

UI and settings hijack via privileged IPC

Published Sep 29, 2026 · Updated Sep 29, 2026

Privileged IPC exposure in Progress Telerik Fiddler Everywhere before 8.2.0 allows local users to replace its UI or settings via altered launch parameters. The application exposes privileged IPC functionality through application launch parameters, allowing attacker-controlled content to replace the UI or settings; Progress has not published a more specific method or function. A low-privileged user must alter those parameters and persuade another user to start the application; the resulting content can disclose OAuth tokens, run locally accessible programs, or modify application-generated configuration files.

CVSS severity5.6
Medium
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Privileged IPC exposure in Progress Telerik Fiddler Everywhere before 8.2.0 allows local users to replace its UI or settings via altered launch parameters. The application exposes privileged IPC functionality through application launch parameters, allowing attacker-controlled content to replace the UI or settings; Progress has not published a more specific method or function. A low-privileged user must alter those parameters and persuade another user to start the application; the resulting content can disclose OAuth tokens, run locally accessible programs, or modify application-generated configuration files.

The record

CVE
CVE-2026-86157
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Progress Software Corporation
Product
Fiddler Everywhere
Classifications
CWE-749, CAPEC-122, T1204
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <8.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Progress Software Corporation · Fiddler Everywhereversion=1.0.0 <8.2.0

Published CVSS scores

5.6Progress SoftwareCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-749Exposed Dangerous Method or Function
CAPEC-122Privilege Abuse
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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