How severe is CVE-2021-34814?

CVE-2021-34814 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-2021-34814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34814?

CVE-2021-34814 affects Proofpoint Spam Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34814?

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-2021-34814 published?

CVE-2021-34814 was published on 2021-10-13 and last updated on 2026-06-17.

CVE-2021-34814

CVE-2021-34814 is a high-severity vulnerability in Proofpoint Spam Engine 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Proofpoint Spam Engine
Published: 2021-10-13
Last modified: 2026-06-17

Description

Proofpoint Spam Engine before 8.12.0-2106240000 has a Security Control Bypass.

Frequently asked questions

What is CVE-2021-34814?: Proofpoint Spam Engine before 8.12.0-2106240000 has a Security Control Bypass.
How severe is CVE-2021-34814?: CVE-2021-34814 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-2021-34814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34814?: CVE-2021-34814 affects Proofpoint Spam Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34814?: 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-2021-34814 published?: CVE-2021-34814 was published on 2021-10-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:proofpoint:spam_engine:*:*:*:*:*:*:*:*