CVE-2007-1649

PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain...

7.8 HighPublic exploit

PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain scripts with a serialized data input string beginning with S:, which does not properly track the number of input bytes being processed.

Exploit likelihood

7.49%Up 0.7 points since Feb 4, 2022

What each source reports

NVD Score used 7.8

Record: CVE-2007-1649
CVSS 2.0: 7.8 HighAV:N/AC:L/Au:N/C:C/I:N/A:N
Updated: 2026-11-02

CVE List No score

Record: CVE-2007-1649
Updated: 2026-11-02

EUVDEUVD-2007-1643 No score

Record: EUVD-2007-1643
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mhvw-9cx4-p5jj No score

PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain...

Record: GHSA-mhvw-9cx4-p5jj
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	PHP 5.2.1 - 'Unserialize()' Local Information Leak	2007-03-23

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2007-1649 is a high vulnerability (CVSS 7.8) in Php, published March 24, 2007. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 7.49%, the 94th percentile. No source names a fixed version.