PatchTheCVECVE-2011-4896: Tor before 0.2.2.24-alpha continues to use a reachable bridge that was previously configured but is not curren
CVE-2011-4896 is a medium-severity flaw (CVSS 4.3) affecting tor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| EPSS exploit chance | 1.5% (top 26%) |
| CISA exploited list | No |
| Weakness | CWE-200 |
| Published | 2011-12-23 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2011-4896?
tor: upgrade to newer than 0.2.2.23. Exact commands for each OS are on this page.
Is CVE-2011-4896 being exploited?
CVE-2011-4896 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2011-4896 affect?
CVE-2011-4896 affects tor. Severity is medium (CVSS 4.3). 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
How urgent is CVE-2011-4896?
Priority 34/100. No elevated risk signals yet.
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