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CVE-2021-39304

24
FAUCET Score

CVE-2021-39304 describes a security control bypass vulnerability affecting Proofpoint Enterprise Protection versions prior to 8.12.0-2108090000. This high-severity vulnerability, with a CVSS score of 7.5, can be exploited remotely without user interaction (AV:N/AC:L/UI:N), potentially leading to a high impact on availability (A:H). There is no public exploit code available, nor is there evidence of active exploitation, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.12.0-2107140000, < 8.12.0-2108090000CPE matchmatch criteria
cpe:2.3:a:proofpoint:enterprise_protection:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 34th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

proofpoint.com / us/blog
Vendor Advisory
proofpoint.com / us/security/security-advisories/pfpt-sa-2021-0007
Vendor Advisory