Is CVE-2011-4896 being actively exploited?

CVE-2011-4896 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4896?

CVE-2011-4896 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2011-4896

MEDIUM · CVSS 4.3EPSS 1.5%EU EUVD

Tor before 0.2.2.24-alpha continues to use a reachable bridge that was previously configured but is not currently configured, which might allow remote attackers to obtain sensitive information about clients in opportunistic circumstances by monitoring network traffic to the bridge port.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 1.5% (74th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4813)
Published: December 23, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4813 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

tor / tor
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and 176 more…

References

https://blog.torproject.org/blog/tor-02224-alpha-out

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

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