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Product
Progress® Telerik® Fiddler® Classic
by Progress Software · last CVE Oct 5, 2026
4
CVEs
0
On KEV
7.9
Max CVSS
4
New 30D
Vulnerabilities4In the news0Timeline
Severity mix
Critical 0High 1Medium 2Low 1
Severity
All severities4Critical0High1Medium2Low1
Exploitation
On CISA KEV0Exploited in the wild0
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-77804
6.6
0%
Oct 5
Time-of-check Time-of-use (TOCTOU) Race Condition in Root Certificate Installation in Progress® Telerik® Fiddler® Classic
Affected: 1.0.0 before 6.0.20262.10021
CVE-2026-77802
6.3
0%
Oct 5
HTTP Request Smuggling Vulnerability in Progress® Telerik® Fiddler® Classic
Affected: 1.0.0 before 6.0.20262.10021
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