CVE-2016-3141

Use-after-free vulnerability in wddx.c in the WDDX extension in PHP before 5.5.33 and 5.6.x before 5.6.19 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact by triggering a wddx_deserialize call on XML data containing a crafted var element.

Published: 2016-03-31 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-3141 is rated High Risk (73.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 72.28%, 99th 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-2016-3141

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 2026-03-11 72.67% 72.28% -0.39%
2 2026-02-26 72.44% 72.67% +0.22%
3 2026-02-21 — 72.44% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3141

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-3141

OS Trackers for CVE-2016-3141

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2016-3141
suse medium CVE-2016-3141 severity moderate: SUSE including 197 source package names (apache2-mod_php5-5.2.14-0.7.30.79.1, apache2-mod_php5-5.5.14-53.1, …), 468 product×package rows across 16 product lines (SUSE Linux Enterprise Module for Web and Scripting 12, SUSE Linux Enterprise Server 11 SP1-TERADATA, … (16 product lines)): Fixed 468. https://www.suse.com/security/cve/CVE-2016-3141/
ubuntu medium CVE-2016-3141 medium priority: Ubuntu including 2 source packages (php5, php7.0), 8 status rows across 4 suites (precise, trusty, upstream, wily): released 5, DNE 3. https://ubuntu.com/security/CVE-2016-3141

Affected software / configurations for CVE-2016-3141

Vendor Product Version Raw CPE
apple mac_os_x <= 10.11.4 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
php php <= 5.5.32 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php 5.6.0 cpe:2.3:a:php:php:5.6.0:*:*:*:*:*:*:*
php php 5.6.1 cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:*
php php 5.6.2 cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:*
php php 5.6.3 cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:*
php php 5.6.4 cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:*
php php 5.6.5 cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:*
php php 5.6.6 cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:*
php php 5.6.7 cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:*
php php 5.6.8 cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:*
php php 5.6.9 cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:*
php php 5.6.10 cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:*
php php 5.6.11 cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:*
php php 5.6.12 cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:*
php php 5.6.13 cpe:2.3:a:php:php:5.6.13:*:*:*:*:*:*:*
php php 5.6.14 cpe:2.3:a:php:php:5.6.14:*:*:*:*:*:*:*
php php 5.6.15 cpe:2.3:a:php:php:5.6.15:*:*:*:*:*:*:*
php php 5.6.16 cpe:2.3:a:php:php:5.6.16:*:*:*:*:*:*:*
php php 5.6.17 cpe:2.3:a:php:php:5.6.17:*:*:*:*:*:*:*
php php 5.6.18 cpe:2.3:a:php:php:5.6.18:*:*:*:*:*:*:*

References for CVE-2016-3141

URL Tags
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=b1bd4119bcafab6f9a8f84d92cd65eec3afeface
http://lists.apple.com/archives/security-announce/2016/May/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00052.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00057.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00058.html
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html
http://www.securityfocus.com/bid/84271
http://www.securitytracker.com/id/1035255
http://www.ubuntu.com/usn/USN-2952-1
http://www.ubuntu.com/usn/USN-2952-2
https://bugs.php.net/bug.php?id=71587
https://php.net/ChangeLog-5.php
https://support.apple.com/HT206567
cvelogic Threat Intelligence