CVE-2015-4600

35

FAUCET Score

CVE-2015-4600 is a critical vulnerability affecting PHP versions before 5.4.40, 5.5.24, and 5.6.8, specifically within the SoapClient implementation. It allows remote attackers to cause a denial of service (application crash) or potentially execute arbitrary code due to type confusion issues in several SoapClient methods. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity, requiring no user interaction or privileges, and can lead to high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		7.0CPE matchmatch criteria	cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:::::::*
		7.0CPE matchmatch criteria	cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:::::::*
		7.1CPE matchmatch criteria	cpe:2.3:o:redhat:enterprise_linux_hpc_node_eus:7.1:::::::*
		7.0CPE matchmatch criteria	cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*
		7.1CPE matchmatch criteria	cpe:2.3:o:redhat:enterprise_linux_server_eus:7.1:::::::*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.0

Exploit Intelligence

EPSS Score

10.72%

Probability of exploitation in next 30 days

EPSS Percentile

95.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.1072 is in the 91st percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: php-0:5.3.3-46.el6_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: php-0:5.4.16-36.ael7b_1

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: php55-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: php55-php-0:5.5.21-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: php54-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: php54-php-0:5.4.40-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: php54-php-pecl-zendopcache-0:7.0.4-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUSFixed in: php55-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUSFixed in: php55-php-0:5.5.21-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUSFixed in: php54-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUSFixed in: php54-php-0:5.4.40-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.5 EUSFixed in: php54-php-pecl-zendopcache-0:7.0.4-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: php55-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: php55-php-0:5.5.21-2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: php54-0:2.0-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: php54-php-0:5.4.40-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: php54-php-pecl-zendopcache-0:7.0.4-3.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: php55-0:2.0-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: php55-php-0:5.5.21-2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: php54-0:2.0-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: php54-php-0:5.4.40-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: php54-php-pecl-zendopcache-0:7.0.4-3.el7

redhatno patchvia redhat_api

Product: Red Hat Software CollectionsFixed in: php54-php

redhatno patchvia redhat_api

Product: Red Hat Software CollectionsFixed in: php55-php

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: php

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: php53

Vendor Advisories (1)

redhatCVE-2015-4600Moderate

php: type confusion issue in unserialize() with various SOAP methods

References

php.net / ChangeLog-5.php

rhn.redhat.com / errata/RHSA-2015-1135.html

rhn.redhat.com / errata/RHSA-2015-1218.html

bugs.php.net / bug.php

Exploit

openwall.com / lists/oss-security/2015/06/16/12

oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html

securityfocus.com / bid/74413

securitytracker.com / id/1032709