CVE-2016-7124

Exp

ext/standard/var_unserializer.c in PHP before 5.6.25 and 7.x before 7.0.10 mishandles certain invalid objects, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted serialized data that leads to a (1) __destruct call or (2) magic method call.

Published: 2016-09-12 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-7124 is rated High Exploit Risk (90.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 74.66%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.28% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2016-7124

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-7124

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 2026-01-16 73.39% 74.66% +1.28%
2 2025-12-28 73.63% 73.39% -0.25%
3 2025-12-27 — 73.63% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7124

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-2016-7124

OS Trackers for CVE-2016-7124

vendor priority summary link
gentoo normal CVE-2016-7124: 1 GLSA(s) (201611-22), 1 atom(s) (dev-lang/php); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-7124
redhat medium — https://access.redhat.com/security/cve/CVE-2016-7124
suse low CVE-2016-7124 severity low: SUSE including 301 source package names (apache2-mod_php5-5.2.14-0.7.30.94.1, apache2-mod_php5-5.5.14-73.1, …), 666 product×package rows across 19 product lines (SUSE Linux Enterprise Module for Web and Scripting 12, SUSE Linux Enterprise Module for Web and Scripting 15 SP4, … (19 product lines)): Fixed 572, Known Not Affected 94. https://www.suse.com/security/cve/CVE-2016-7124/
ubuntu low CVE-2016-7124 low priority: Ubuntu including 2 source packages (php5, php7.0), 8 status rows across 4 suites (precise, trusty, upstream, xenial): released 5, DNE 3. https://ubuntu.com/security/CVE-2016-7124

Affected software / configurations for CVE-2016-7124

Vendor Product Version Raw CPE
php php 7.0.0 cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*
php php 7.0.1 cpe:2.3:a:php:php:7.0.1:*:*:*:*:*:*:*
php php 7.0.2 cpe:2.3:a:php:php:7.0.2:*:*:*:*:*:*:*
php php 7.0.3 cpe:2.3:a:php:php:7.0.3:*:*:*:*:*:*:*
php php 7.0.4 cpe:2.3:a:php:php:7.0.4:*:*:*:*:*:*:*
php php 7.0.5 cpe:2.3:a:php:php:7.0.5:*:*:*:*:*:*:*
php php 7.0.6 cpe:2.3:a:php:php:7.0.6:*:*:*:*:*:*:*
php php 7.0.7 cpe:2.3:a:php:php:7.0.7:*:*:*:*:*:*:*
php php 7.0.8 cpe:2.3:a:php:php:7.0.8:*:*:*:*:*:*:*
php php 7.0.9 cpe:2.3:a:php:php:7.0.9:*:*:*:*:*:*:*
php php <= 5.6.24 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

References for CVE-2016-7124

cvelogic Threat Intelligence