CVE-2017-7186

libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a denial of service (segmentation violation for read access, and application crash) by triggering an invalid Unicode property lookup.

Published: 2017-03-20 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-7186 is rated Moderate Risk (59.8/100): CVSS High severity, with high exploitation likelihood (EPSS 5.03%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-7186

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 7.10% 5.03% -2.07%
2 2026-03-17 5.41% 7.10% +1.70%
3 2025-11-21 — 5.41% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-7186

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-7186

OS Trackers for CVE-2017-7186

vendor priority summary link
alpine — CVE-2017-7186: 1 source package rows (pcre); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2017-7186
debian not yet assigned CVE-2017-7186 not yet assigned priority: Debian including 2 source packages (pcre2, pcre3), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7. https://security-tracker.debian.org/tracker/CVE-2017-7186
gentoo normal CVE-2017-7186: 2 GLSA(s) (201710-09, 201710-25), 2 atom(s) (dev-libs/libpcre, dev-libs/libpcre2); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-7186
redhat medium — https://access.redhat.com/security/cve/CVE-2017-7186
suse medium CVE-2017-7186 severity moderate: SUSE including 363 source package names (24.324:libpcre1-8.45-8.7.1, 26.374:libpcre1-8.45-8.7.1, …), 872 product×package rows across 100 product lines (Container suse/ltss/sle12.5/sles12sp5, Container suse/sles12sp3, … (100 product lines)): Fixed 437, Known Not Affected 278, Known Affected 157. https://www.suse.com/security/cve/CVE-2017-7186/
ubuntu low CVE-2017-7186 low priority: Ubuntu including 2 source packages (pcre2, pcre3), 46 status rows across 23 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): not-affected 36, ignored 4, released 3, DNE 2, needed 1. https://ubuntu.com/security/CVE-2017-7186

Affected software / configurations for CVE-2017-7186

Vendor Product Version Raw CPE
pcre pcre 8.40 cpe:2.3:a:pcre:pcre:8.40:*:*:*:*:*:*:*
pcre pcre2 10.23 cpe:2.3:a:pcre:pcre2:10.23:*:*:*:*:*:*:*

References for CVE-2017-7186

cvelogic Threat Intelligence