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CVE-2015-3249

26
FAUCET Score

CVE-2015-3249 describes a critical vulnerability in Apache Traffic Server 5.3.x before 5.3.1, specifically within its experimental HTTP/2 feature. Attackers can exploit this flaw remotely, leading to a denial of service through out-of-bounds access and daemon crashes, with the potential for arbitrary code execution. Rated with a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with no user interaction required, posing a significant risk of complete compromise. Despite its high severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.3.0CPE matchmatch criteria
cpe:2.3:a:apache:traffic_server:5.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.44%
Probability of exploitation in next 30 days
EPSS Percentile
91.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0544 is in the 86th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mail-archives.us.apache.org / mod_mbox/www-announce/201507.mbox/%3CCABF6JR37mWzDmXDqRQwRUXiojBZrhidndnsY1ZgmcZv-o7-a+g%40mail.gmail.com%3E
yahoo-security.tumblr.com / post/122883273670/apache-traffic-server-http2-fuzzing
Issue TrackingThird Party Advisory
securityfocus.com / bid/101631
Third Party AdvisoryVDB Entry