How severe is CVE-2019-12097?

CVE-2019-12097 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12097 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12097?

CVE-2019-12097 affects Progress Fiddler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12097?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-12097 published?

CVE-2019-12097 was published on 2019-06-03 and last updated on 2026-06-17.

CVE-2019-12097

CVE-2019-12097 is a high-severity vulnerability in Progress Fiddler with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-354.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-354
Affected product: Progress Fiddler
Published: 2019-06-03
Last modified: 2026-06-17

Description

Telerik Fiddler v5.0.20182.28034 doesn't verify the hash of EnableLoopback.exe before running it, which could lead to code execution or local privilege escalation by replacing the original EnableLoopback.exe.

Frequently asked questions

What is CVE-2019-12097?: Telerik Fiddler v5.0.20182.28034 doesn't verify the hash of EnableLoopback.exe before running it, which could lead to code execution or local privilege escalation by replacing the original EnableLoopback.exe.
How severe is CVE-2019-12097?: CVE-2019-12097 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12097 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12097?: CVE-2019-12097 affects Progress Fiddler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12097?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-12097 published?: CVE-2019-12097 was published on 2019-06-03 and last updated on 2026-06-17.

References

https://vuldb.com/?id.135671

Affected products (1)

cpe:2.3:a:progress:fiddler:5.0.20182.28034:*:*:*:*:*:*:*

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