How severe is CVE-2021-31608?

CVE-2021-31608 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-31608 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31608?

CVE-2021-31608 affects Proofpoint Enterprise Protection. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31608?

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

When was CVE-2021-31608 published?

CVE-2021-31608 was published on 2022-11-17 and last updated on 2026-06-17.

CVE-2021-31608

CVE-2021-31608 is a medium-severity vulnerability in Proofpoint Enterprise Protection with a CVSS 3.x base score of 4.3. 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-693.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-693
Affected product: Proofpoint Enterprise Protection
Published: 2022-11-17
Last modified: 2026-06-17

Description

Proofpoint Enterprise Protection before 18.8.0 allows a Bypass of a Security Control.

Frequently asked questions

What is CVE-2021-31608?: Proofpoint Enterprise Protection before 18.8.0 allows a Bypass of a Security Control.
How severe is CVE-2021-31608?: CVE-2021-31608 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-31608 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31608?: CVE-2021-31608 affects Proofpoint Enterprise Protection. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31608?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31608 published?: CVE-2021-31608 was published on 2022-11-17 and last updated on 2026-06-17.

References

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0011

Affected products (1)

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

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