How severe is CVE-2020-35359?

CVE-2020-35359 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-35359 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35359?

CVE-2020-35359 affects Pureftpd Pure-ftpd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35359?

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-2020-35359 published?

CVE-2020-35359 was published on 2020-12-26 and last updated on 2026-06-17.

CVE-2020-35359

CVE-2020-35359 is a high-severity vulnerability in Pureftpd Pure-ftpd with a CVSS 3.x base score of 7.5. 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Pureftpd Pure-ftpd
Published: 2020-12-26
Last modified: 2026-06-17

Description

Pure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exceed the connection limit.

Frequently asked questions

What is CVE-2020-35359?: Pure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exceed the connection limit.
How severe is CVE-2020-35359?: CVE-2020-35359 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-35359 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35359?: CVE-2020-35359 affects Pureftpd Pure-ftpd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35359?: 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-2020-35359 published?: CVE-2020-35359 was published on 2020-12-26 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/49105

Affected products (1)

cpe:2.3:a:pureftpd:pure-ftpd:1.0.48:*:*:*:*:*:*:*

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