CVE-2015-4601

29

FAUCET Score

CVE-2015-4601 is a critical type confusion vulnerability affecting PHP versions prior to 5.6.7, specifically within the SOAP extension. This flaw allows remote attackers to trigger a denial of service (application crash) and potentially execute arbitrary code. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low attack complexity, and 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

8.17%

Probability of exploitation in next 30 days

EPSS Percentile

94.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0817 is in the 90th percentile among its peer group of 36,897 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-2015-4601Moderate

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

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

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

securityfocus.com / bid/75246

securitytracker.com / id/1032709