How severe is CVE-2009-0936?

CVE-2009-0936 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-0936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0936?

CVE-2009-0936 primarily affects Tor. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0936?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0936 published?

CVE-2009-0936 was published on 2009-03-18 and last updated on 2026-06-16.

CVE-2009-0936

CVE-2009-0936 is a medium-severity vulnerability in Tor with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Tor
Published: 2009-03-18
Last modified: 2026-06-16

Description

Unspecified vulnerability in Tor before 0.2.0.34 allows attackers to cause a denial of service (infinite loop) via "corrupt votes."

Frequently asked questions

What is CVE-2009-0936?: Unspecified vulnerability in Tor before 0.2.0.34 allows attackers to cause a denial of service (infinite loop) via "corrupt votes."
How severe is CVE-2009-0936?: CVE-2009-0936 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-0936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0936?: CVE-2009-0936 primarily affects Tor. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0936 published?: CVE-2009-0936 was published on 2009-03-18 and last updated on 2026-06-16.

References

Affected products (30)

cpe:2.3:a:tor:tor:*:*:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.1:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.2:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.3:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.4:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.5:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.6:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.10:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.11:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.12:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.13:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.14:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.15:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.16:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.17:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.18:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.19:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.20:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.21:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.22:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.23:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.24:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.25:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.26:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.27:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.28:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.29:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.30:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.31:alpha:*:*:*:*:*:*
cpe:2.3:a:tor:tor:0.2.0.32:alpha:*:*:*:*:*:*

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