How severe is CVE-2020-15591?

CVE-2020-15591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15591?

CVE-2020-15591 affects Uni-stuttgart Frams' Fast File Exchange. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15591?

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

When was CVE-2020-15591 published?

CVE-2020-15591 was published on 2022-03-17 and last updated on 2026-06-17.

CVE-2020-15591

CVE-2020-15591 is a critical-severity vulnerability in Uni-stuttgart Frams' Fast File Exchange with a CVSS 3.x base score of 9.8. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Uni-stuttgart Frams' Fast File Exchange
Published: 2022-03-17
Last modified: 2026-06-17

Description

fexsrv in F*EX (aka Frams' Fast File EXchange) before fex-20160919_2 allows eval injection (for unauthenticated remote code execution).

Frequently asked questions

What is CVE-2020-15591?: fexsrv in F*EX (aka Frams' Fast File EXchange) before fex-20160919_2 allows eval injection (for unauthenticated remote code execution).
How severe is CVE-2020-15591?: CVE-2020-15591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15591?: CVE-2020-15591 affects Uni-stuttgart Frams' Fast File Exchange. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-15591 published?: CVE-2020-15591 was published on 2022-03-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:uni-stuttgart:frams\'_fast_file_exchange:*:*:*:*:*:*:*:*

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