CVE-2014-3622Network attack vector

Remote code execution via unsafe ksep reuse

Published Feb 19, 2020 · Updated Aug 6, 2024

Use-after-free in PHP Posthandler before 5.6.1 allows remote attackers to execute arbitrary code through crafted POST data. add_post_var passes its ksep pointer by reference to an input filter without first duplicating the value, allowing a filter to free or replace memory that PHP subsequently reuses or releases. The path requires an enabled third-party filter with that behavior; the upstream report identified no such extension, and the known ext/filter and Suhosin filters did not modify the value.

CVSS severity9.8
Critical
EPSS probability3.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in PHP Posthandler before 5.6.1 allows remote attackers to execute arbitrary code through crafted POST data. add_post_var passes its ksep pointer by reference to an input filter without first duplicating the value, allowing a filter to free or replace memory that PHP subsequently reuses or releases. The path requires an enabled third-party filter with that behavior; the upstream report identified no such extension, and the known ext/filter and Suhosin filters did not modify the value.

The record

CVE
CVE-2014-3622
Published
Feb 19, 2020
Updated
Aug 6, 2024
Vendor
The PHP Group
Product
PHP
Classifications
CWE-416, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6.x before 5.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The PHP Group · PHPversion=5.6.x before 5.6.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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