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CVE-2016-9138

25
FAUCET Score

CVE-2016-9138 is a critical vulnerability affecting PHP versions through 5.6.27 and 7.x through 7.0.12, stemming from improper handling of property modification during __wakeup processing. This flaw allows remote attackers to trigger a denial of service or potentially achieve other unspecified impacts by providing specially crafted serialized data. With a CVSS score of 9.8 (CRITICAL), it is easily exploitable over the network with low attack complexity, posing a high risk to confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage, suggesting a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.6.27CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
7.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.1:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.2:*:*:*:*:*:*:*
7.0.3CPE matchmatch criteria
cpe:2.3:a:php:php:7.0.3:*:*:*:*:*:*:*

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
3.86%
Probability of exploitation in next 30 days
EPSS Percentile
89.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0386 is in the 82nd percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Vendor Patches (8)

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
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php54-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php55-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php56-php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php70-php

Vendor Advisories (1)

redhatCVE-2016-9138Moderate

php: Use after free in unserialize() via DateInterval::__wakeup()

Sep 26, 2016

References

bugs.php.net / bug.php
Vendor Advisory
openwall.com / lists/oss-security/2016/11/01/2
Third Party Advisory
securityfocus.com / bid/95268