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CVE-2017-7186

27
FAUCET Score

CVE-2017-7186 is a denial-of-service vulnerability affecting libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23. It allows remote attackers to trigger a segmentation violation and application crash through an invalid Unicode property lookup. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to high availability impact. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.40CPE matchmatch criteria
cpe:2.3:a:pcre:pcre:8.40:*:*:*:*:*:*:*
10.23CPE matchmatch criteria
cpe:2.3:a:pcre:pcre2:10.23:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.03%
Probability of exploitation in next 30 days
EPSS Percentile
91.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0503 is in the 85th percentile among its peer group of 51,506 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: httpd
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: pcre
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1Fixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: httpd

Vendor Advisories (1)

redhatCVE-2017-7186Moderate

pcre: Invalid Unicode property lookup (8.41/7, 10.24/2)

Feb 23, 2017

References

access.redhat.com / errata/RHSA-2018:2486
blogs.gentoo.org / ago/2017/03/14/libpcre-invalid-memory-read-in-match-pcre_exec-c
PatchThird Party Advisory
bugs.exim.org / show_bug.cgi
Third Party Advisory
security.gentoo.org / glsa/201710-09
security.gentoo.org / glsa/201710-25
vcs.pcre.org / pcre2/code/trunk/src/pcre2_internal.h
Patch
vcs.pcre.org / pcre2/code/trunk/src/pcre2_ucd.c
Patch
vcs.pcre.org / pcre/code/trunk/pcre_internal.h
Patch
vcs.pcre.org / pcre/code/trunk/pcre_ucd.c
Patch
securityfocus.com / bid/97030