How severe is CVE-2020-14009?

CVE-2020-14009 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2020-14009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-14009?

CVE-2020-14009 affects Proofpoint Enterprise Protection. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-14009?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-14009 published?

CVE-2020-14009 was published on 2021-05-07 and last updated on 2026-06-17.

CVE-2020-14009

CVE-2020-14009 is a medium-severity vulnerability in Proofpoint Enterprise Protection with a CVSS 3.x base score of 6.3. 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: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.8
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-354
Affected product: Proofpoint Enterprise Protection
Published: 2021-05-07
Last modified: 2026-06-17

Description

Proofpoint Enterprise Protection (PPS/PoD) before 8.16.4 contains a vulnerability that could allow an attacker to deliver an email message with a malicious attachment that bypasses scanning and file-blocking rules. The vulnerability exists because messages with certain crafted and malformed multipart structures are not properly handled.

Frequently asked questions

What is CVE-2020-14009?: Proofpoint Enterprise Protection (PPS/PoD) before 8.16.4 contains a vulnerability that could allow an attacker to deliver an email message with a malicious attachment that bypasses scanning and file-blocking rules. The vulnerability exists because messages with certain crafted and malformed multipart structures are not properly handled.
How severe is CVE-2020-14009?: CVE-2020-14009 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2020-14009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-14009?: CVE-2020-14009 affects Proofpoint Enterprise Protection. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-14009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-14009 published?: CVE-2020-14009 was published on 2021-05-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:proofpoint:enterprise_protection:*:*:*:*:-:*:*:*

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