Is CVE-2007-3998 being actively exploited?

CVE-2007-3998 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2007-3998?

CVE-2007-3998 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2007-3998

MEDIUM · CVSS 5.0EPSS 3.0%EU EUVD

The wordwrap function in PHP 4 before 4.4.8, and PHP 5 before 5.2.4, does not properly use the breakcharlen variable, which allows remote attackers to cause a denial of service (divide-by-zero error and application crash, or infinite loop) via certain arguments, as demonstrated by a 'chr(0), 0, ""' argument set.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-20
EPSS score: 3.0% (87th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2007-3982)
Published: September 4, 2007
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-3982 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
php / php

References

http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2007-0889.html(Third Party Advisory)
http://secunia.com/advisories/26642(Third Party Advisory)
http://secunia.com/advisories/26822(Third Party Advisory)
http://secunia.com/advisories/26838(Third Party Advisory)
http://secunia.com/advisories/26871(Third Party Advisory)
http://secunia.com/advisories/26895(Third Party Advisory)
http://secunia.com/advisories/26930(Third Party Advisory)
http://secunia.com/advisories/26967(Third Party Advisory)
http://secunia.com/advisories/27102(Third Party Advisory)
http://secunia.com/advisories/27377(Third Party Advisory)
http://secunia.com/advisories/27545(Third Party Advisory)
http://secunia.com/advisories/27864(Third Party Advisory)
http://secunia.com/advisories/28249(Third Party Advisory)
http://secunia.com/advisories/28658(Third Party Advisory)
http://secunia.com/advisories/30288(Third Party Advisory)
http://secweb.se/en/advisories/php-wordwrap-vulnerability/(Third Party Advisory)
http://support.avaya.com/elmodocs2/security/ASA-2007-449.htm(Third Party Advisory)
http://www.debian.org/security/2008/dsa-1444(Third Party Advisory)
http://www.debian.org/security/2008/dsa-1578(Third Party Advisory)
http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDKSA-2007:187(Third Party Advisory)
http://www.php.net/ChangeLog-5.php#5.2.4(Vendor Advisory)
http://www.php.net/releases/5_2_4.php(Vendor Advisory)
http://www.redhat.com/support/errata/RHSA-2007-0890.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2007-0891.html(Third Party Advisory)
http://www.trustix.org/errata/2007/0026/(Broken Link)
http://www.ubuntu.com/usn/usn-549-2(Third Party Advisory)
http://www.vupen.com/english/advisories/2007/3023(Permissions Required, Third Party Advisory)
https://issues.rpath.com/browse/RPL-1693(Broken Link)
https://issues.rpath.com/browse/RPL-1702(Broken Link)
https://launchpad.net/bugs/173043(Third Party Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10603(Third Party Advisory)
https://usn.ubuntu.com/549-1/(Third Party Advisory)
https://www.redhat.com/archives/fedora-package-announce/2007-September/msg00354.html(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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