PatchTheCVECVE-2007-1103: Tor does not verify a node's uptime and bandwidth advertisements, which allows remote attackers who operate a
CVE-2007-1103 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 does not verify a node's uptime and bandwidth advertisements, which allows remote attackers who operate a low resource node to make false claims of greater resources, which places the node into use for many circuits and compromises the anonymity of traffic sources and destinations.
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 | 1.8% (top 22%) |
| CISA exploited list | No |
| Published | 2007-02-26 |
| 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-2007-1103?
tor: upgrade to newer than 0.1.1.26. Exact commands for each OS are on this page.
Is CVE-2007-1103 being exploited?
CVE-2007-1103 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-2007-1103 affect?
CVE-2007-1103 affects tor. Severity is medium (CVSS 4.3). Tor does not verify a node's uptime and bandwidth advertisements, which allows remote attackers who operate a low resource node to make false claims of greater resources, which places the node into use for many circuits and compromises the
How urgent is CVE-2007-1103?
Priority 35/100. No elevated risk signals yet.
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