How severe is CVE-2015-5168?

CVE-2015-5168 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-2015-5168 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5168?

CVE-2015-5168 primarily affects Apache Traffic Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5168?

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-2015-5168 published?

CVE-2015-5168 was published on 2017-09-13 and last updated on 2026-06-17.

CVE-2015-5168

CVE-2015-5168 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apache Traffic Server
Published: 2017-09-13
Last modified: 2026-06-17

Description

Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.2 has unknown impact and attack vectors, a different vulnerability than CVE-2015-5206.

Frequently asked questions

What is CVE-2015-5168?: Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.2 has unknown impact and attack vectors, a different vulnerability than CVE-2015-5206.
How severe is CVE-2015-5168?: CVE-2015-5168 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-2015-5168 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5168?: CVE-2015-5168 primarily affects Apache Traffic Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-5168?: 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-2015-5168 published?: CVE-2015-5168 was published on 2017-09-13 and last updated on 2026-06-17.

References

http://mail-archives.us.apache.org/mod_mbox/www-announce/201509.mbox/%3CCABF6JR2j5vesvnjbm6sDPB_zAGj3kNgzzHEpLUh6dWG6t8mC2w%40mail.gmail.com%3E

Affected products (2)

cpe:2.3:a:apache:traffic_server:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:5.3.1:*:*:*:*:*:*:*

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