Is CVE-2011-1901 being actively exploited?

CVE-2011-1901 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-1901?

CVE-2011-1901 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2011-1901

HIGH · CVSS 7.5EPSS 2.0%EU EUVD

The mail-filter web interface in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to bypass authentication via unspecified vectors.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-287
EPSS score: 2.0% (80th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1899)
Published: May 5, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1899 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

proofpoint / messaging security gateway
proofpoint / protection server
proofpoint / protection server
proofpoint / protection server
proofpoint / protection server
proofpoint / protection server
proofpoint / protection server

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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