CVE-2016-7478 [High] | Denial of Service in Php

CVE-2016-7478 is rated High Exploit Risk (84.5/100): CVSS High severity, with high exploitation likelihood (EPSS 42.40%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +23.54% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

EDB-ID

Source

Kind

Published

Link

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nvd_ref

exploit_tag

Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	18.86%	42.40%	+23.54%
2	2026-03-04	10.98%	18.86%	+7.88%
3	2026-03-01	—	10.98%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

18.86%

42.40%

+23.54%

2026-03-04

10.98%

18.86%

+7.88%

2026-03-01

—

10.98%

—

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]

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]

OS Trackers for CVE-2016-7478

vendor	priority	summary	link
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2016-7478
`suse`	medium	CVE-2016-7478 severity moderate: SUSE including 164 source package names (apache2-mod_php5-5.5.14-96.1, apache2-mod_php53-5.3.17-101.1, …), 482 product×package rows across 15 product lines (SUSE Linux Enterprise Module for Web and Scripting 12, SUSE Linux Enterprise Point of Sale 11 SP3, … (15 product lines)): Fixed 482.	https://www.suse.com/security/cve/CVE-2016-7478/
`ubuntu`	medium	CVE-2016-7478 medium priority: Ubuntu including 2 source packages (php5, php7.0), 10 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): DNE 4, needs-triage 2, not-affected 2, released 2.	https://ubuntu.com/security/CVE-2016-7478

Affected software / configurations for CVE-2016-7478

Vendor	Product	Version	Raw CPE
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:::::::*
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:beta1::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:beta2::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:beta3::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:beta4::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:rc1::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:rc2::::::
php	php	5.0.0	cpe:2.3:a:php:php:5.0.0:rc3::::::
php	php	5.0.1	cpe:2.3:a:php:php:5.0.1:::::::*
php	php	5.0.2	cpe:2.3:a:php:php:5.0.2:::::::*
php	php	5.0.3	cpe:2.3:a:php:php:5.0.3:::::::*
php	php	5.0.4	cpe:2.3:a:php:php:5.0.4:::::::*
php	php	5.0.5	cpe:2.3:a:php:php:5.0.5:::::::*
php	php	5.1.0	cpe:2.3:a:php:php:5.1.0:::::::*
php	php	5.1.1	cpe:2.3:a:php:php:5.1.1:::::::*
php	php	5.1.2	cpe:2.3:a:php:php:5.1.2:::::::*
php	php	5.1.3	cpe:2.3:a:php:php:5.1.3:::::::*
php	php	5.1.4	cpe:2.3:a:php:php:5.1.4:::::::*
php	php	5.1.5	cpe:2.3:a:php:php:5.1.5:::::::*
php	php	5.1.6	cpe:2.3:a:php:php:5.1.6:::::::*
php	php	5.2.0	cpe:2.3:a:php:php:5.2.0:::::::*
php	php	5.2.1	cpe:2.3:a:php:php:5.2.1:::::::*
php	php	5.2.2	cpe:2.3:a:php:php:5.2.2:::::::*
php	php	5.2.3	cpe:2.3:a:php:php:5.2.3:::::::*
php	php	5.2.4	cpe:2.3:a:php:php:5.2.4:::::::*
php	php	5.2.5	cpe:2.3:a:php:php:5.2.5:::::::*
php	php	5.2.6	cpe:2.3:a:php:php:5.2.6:::::::*
php	php	5.2.7	cpe:2.3:a:php:php:5.2.7:::::::*
php	php	5.2.8	cpe:2.3:a:php:php:5.2.8:::::::*
php	php	5.2.9	cpe:2.3:a:php:php:5.2.9:::::::*
php	php	5.2.10	cpe:2.3:a:php:php:5.2.10:::::::*
php	php	5.2.11	cpe:2.3:a:php:php:5.2.11:::::::*
php	php	5.2.12	cpe:2.3:a:php:php:5.2.12:::::::*
php	php	5.2.13	cpe:2.3:a:php:php:5.2.13:::::::*
php	php	5.2.14	cpe:2.3:a:php:php:5.2.14:::::::*
php	php	5.2.15	cpe:2.3:a:php:php:5.2.15:::::::*
php	php	5.2.16	cpe:2.3:a:php:php:5.2.16:::::::*
php	php	5.2.17	cpe:2.3:a:php:php:5.2.17:::::::*
php	php	5.3.0	cpe:2.3:a:php:php:5.3.0:::::::*
php	php	5.3.1	cpe:2.3:a:php:php:5.3.1:::::::*
php	php	5.3.2	cpe:2.3:a:php:php:5.3.2:::::::*
php	php	5.3.3	cpe:2.3:a:php:php:5.3.3:::::::*
php	php	5.3.4	cpe:2.3:a:php:php:5.3.4:::::::*
php	php	5.3.5	cpe:2.3:a:php:php:5.3.5:::::::*
php	php	5.3.6	cpe:2.3:a:php:php:5.3.6:::::::*
php	php	5.3.7	cpe:2.3:a:php:php:5.3.7:::::::*
php	php	5.3.8	cpe:2.3:a:php:php:5.3.8:::::::*
php	php	5.3.9	cpe:2.3:a:php:php:5.3.9:::::::*
php	php	5.3.10	cpe:2.3:a:php:php:5.3.10:::::::*
php	php	5.3.11	cpe:2.3:a:php:php:5.3.11:::::::*
php	php	5.3.12	cpe:2.3:a:php:php:5.3.12:::::::*
php	php	5.3.13	cpe:2.3:a:php:php:5.3.13:::::::*
php	php	5.3.14	cpe:2.3:a:php:php:5.3.14:::::::*
php	php	5.3.15	cpe:2.3:a:php:php:5.3.15:::::::*
php	php	5.3.16	cpe:2.3:a:php:php:5.3.16:::::::*
php	php	5.3.17	cpe:2.3:a:php:php:5.3.17:::::::*
php	php	5.3.18	cpe:2.3:a:php:php:5.3.18:::::::*
php	php	5.3.19	cpe:2.3:a:php:php:5.3.19:::::::*
php	php	5.3.20	cpe:2.3:a:php:php:5.3.20:::::::*
php	php	5.3.21	cpe:2.3:a:php:php:5.3.21:::::::*
php	php	5.3.22	cpe:2.3:a:php:php:5.3.22:::::::*
php	php	5.3.23	cpe:2.3:a:php:php:5.3.23:::::::*
php	php	5.3.24	cpe:2.3:a:php:php:5.3.24:::::::*
php	php	5.3.25	cpe:2.3:a:php:php:5.3.25:::::::*
php	php	5.3.26	cpe:2.3:a:php:php:5.3.26:::::::*
php	php	5.3.27	cpe:2.3:a:php:php:5.3.27:::::::*
php	php	5.3.28	cpe:2.3:a:php:php:5.3.28:::::::*
php	php	5.4.0	cpe:2.3:a:php:php:5.4.0:::::::*
php	php	5.4.1	cpe:2.3:a:php:php:5.4.1:::::::*
php	php	5.4.2	cpe:2.3:a:php:php:5.4.2:::::::*
php	php	5.4.3	cpe:2.3:a:php:php:5.4.3:::::::*
php	php	5.4.4	cpe:2.3:a:php:php:5.4.4:::::::*
php	php	5.4.5	cpe:2.3:a:php:php:5.4.5:::::::*
php	php	5.4.6	cpe:2.3:a:php:php:5.4.6:::::::*
php	php	5.4.7	cpe:2.3:a:php:php:5.4.7:::::::*
php	php	5.4.8	cpe:2.3:a:php:php:5.4.8:::::::*
php	php	5.4.9	cpe:2.3:a:php:php:5.4.9:::::::*
php	php	5.4.10	cpe:2.3:a:php:php:5.4.10:::::::*
php	php	5.4.11	cpe:2.3:a:php:php:5.4.11:::::::*
php	php	5.4.12	cpe:2.3:a:php:php:5.4.12:::::::*

References for CVE-2016-7478

URL	Tags
http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7	Third Party Advisory VDB Entry
http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf	Third Party Advisory
http://www.securityfocus.com/bid/95150
https://bugs.php.net/bug.php?id=73093	Exploit Vendor Advisory
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.youtube.com/watch?v=LDcaPstAuPk	Press/Media Coverage

URL

CVE-2016-7478

Public exploit references (Exploit-DB) for CVE-2016-7478

Exploit prediction scoring system (EPSS) score for CVE-2016-7478

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7478

Weakness enumeration for CVE-2016-7478

OS Trackers for CVE-2016-7478

NVD evaluator notes for CVE-2016-7478

Affected software / configurations for CVE-2016-7478

References for CVE-2016-7478