CVE-2018-10546

An issue was discovered in PHP before 5.6.36, 7.0.x before 7.0.30, 7.1.x before 7.1.17, and 7.2.x before 7.2.5. An infinite loop exists in ext/iconv/iconv.c because the iconv stream filter does not reject invalid multibyte sequences.

Published: 2018-04-29 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-10546 is rated High Risk (69.5/100): CVSS High severity, with high exploitation likelihood (EPSS 64.86%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +25.64% over the last day, indicating growing attacker interest. 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-2018-10546

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 2026-03-04 39.22% 64.86% +25.64%
2 2026-03-01 64.86% 39.22% -25.64%
3 2026-02-25 — 64.86% —

Full EPSS history (58 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-10546

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-2018-10546

OS Trackers for CVE-2018-10546

vendor priority summary link
alpine high CVE-2018-10546: 1 source package rows (php7); 1 state rows across 1 repos (edge-community); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2018-10546
gentoo normal CVE-2018-10546: 1 GLSA(s) (201812-01), 1 atom(s) (dev-lang/php); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-10546
redhat medium — https://access.redhat.com/security/cve/CVE-2018-10546
suse medium CVE-2018-10546 severity moderate: SUSE including 207 source package names (apache2-mod_php5-5.2.14-0.7.30.111.23.1, apache2-mod_php5-5.5.14-109.27.2, …), 388 product×package rows across 11 product lines (SUSE Linux Enterprise Module for Web and Scripting 12, SUSE Linux Enterprise Point of Sale 11 SP3, … (11 product lines)): Fixed 388. https://www.suse.com/security/cve/CVE-2018-10546/
ubuntu medium CVE-2018-10546 medium priority: Ubuntu including 4 source packages (php5, php7.0, php7.1, php7.2), 20 status rows across 5 suites (artful, bionic, trusty, upstream, xenial): DNE 12, released 8. https://ubuntu.com/security/CVE-2018-10546

Affected software / configurations for CVE-2018-10546

Vendor Product Version Raw CPE
php php < 5.6.36 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.0.0, < 7.0.30 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.1.0, < 7.1.17 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.2.0, < 7.2.5 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
netapp storage_automation_store — cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*

References for CVE-2018-10546

URL Tags
http://php.net/ChangeLog-5.php Patch Vendor Advisory
http://php.net/ChangeLog-7.php Patch Vendor Advisory
http://www.securityfocus.com/bid/104019 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040807 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2019:2519
https://bugs.php.net/bug.php?id=76249 Issue Tracking Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/06/msg00005.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/201812-01 Third Party Advisory
https://security.netapp.com/advisory/ntap-20180607-0003/ Third Party Advisory
https://usn.ubuntu.com/3646-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4240 Third Party Advisory
https://www.tenable.com/security/tns-2018-12 Third Party Advisory
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