How severe is CVE-2015-3220?

CVE-2015-3220 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2015-3220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3220?

CVE-2015-3220 affects Tlslite Project Tlslite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-3220 published?

CVE-2015-3220 was published on 2017-06-13 and last updated on 2026-06-17.

CVE-2015-3220

CVE-2015-3220 is a high-severity vulnerability in Tlslite Project Tlslite with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Tlslite Project Tlslite
Published: 2017-06-13
Last modified: 2026-06-17

Description

The tlslite library before 0.4.9 for Python allows remote attackers to trigger a denial of service (runtime exception and process crash).

Frequently asked questions

What is CVE-2015-3220?: The tlslite library before 0.4.9 for Python allows remote attackers to trigger a denial of service (runtime exception and process crash).
How severe is CVE-2015-3220?: CVE-2015-3220 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2015-3220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3220?: CVE-2015-3220 affects Tlslite Project Tlslite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-3220 published?: CVE-2015-3220 was published on 2017-06-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tlslite_project:tlslite:*:*:*:*:*:python:*:*

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