How severe is CVE-2015-3249?

CVE-2015-3249 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-3249 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3249?

CVE-2015-3249 affects Apache Traffic Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3249?

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

When was CVE-2015-3249 published?

CVE-2015-3249 was published on 2017-10-30 and last updated on 2026-06-17.

CVE-2015-3249

CVE-2015-3249 is a critical-severity vulnerability in Apache Traffic Server with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Apache Traffic Server
Published: 2017-10-30
Last modified: 2026-06-17

Description

The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daemon crash) or possibly execute arbitrary code via vectors related to the (1) frame_handlers array or (2) set_dynamic_table_size function.

Frequently asked questions

What is CVE-2015-3249?: The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daemon crash) or possibly execute arbitrary code via vectors related to the (1) frame_handlers array or (2) set_dynamic_table_size function.
How severe is CVE-2015-3249?: CVE-2015-3249 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-3249 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3249?: CVE-2015-3249 affects Apache Traffic Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3249?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-3249 published?: CVE-2015-3249 was published on 2017-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:traffic_server:5.3.0:*:*:*:*:*:*:*

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