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CVE-2015-3798

34
FAUCET Score

CVE-2015-3798 is a memory corruption vulnerability in the TRE library within Libc, affecting Apple iOS before 8.4.1 and OS X before 10.10.5. This flaw allows unauthenticated, remote attackers to execute arbitrary code or cause a denial of service via a specially crafted regular expression. With a CVSS score of 7.5, this vulnerability is considered high severity due to its low attack complexity and potential for partial impact on confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, an exploit demonstrating an integer signedness/overflow has been published on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.4CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
<= 10.10.4CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
13.32%
Probability of exploitation in next 30 days
EPSS Percentile
96.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-38262 · Sep 22, 2015
This CVE's current EPSS score of 0.1332 is in the 94th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2015/Aug/msg00001.html
Vendor Advisory
lists.apple.com / archives/security-announce/2015/Aug/msg00002.html
Vendor Advisory
code.google.com / p/google-security-research/issues/detail
support.apple.com / kb/HT205030
Vendor Advisory
support.apple.com / kb/HT205031
Vendor Advisory
exploit-db.com / exploits/38262
securityfocus.com / bid/76343
securitytracker.com / id/1033275