Is CVE-2008-1721 being actively exploited?

CVE-2008-1721 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-1721?

CVE-2008-1721 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2008-1721

HIGH · CVSS 7.5EPSS 22.6%EU EUVD

Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arbitrary code via a negative signed integer, which triggers insufficient memory allocation and a buffer overflow.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-681
EPSS score: 22.6% (98th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-1722)
Published: April 10, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-1722 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
python / python

References

http://bugs.python.org/issue2586(Issue Tracking, Vendor Advisory)
http://lists.apple.com/archives/security-announce/2009/Feb/msg00000.html(Mailing List, Third Party Advisory)
http://secunia.com/advisories/29889(Not Applicable)
http://secunia.com/advisories/29955(Not Applicable)
http://secunia.com/advisories/30872(Not Applicable)
http://secunia.com/advisories/31255(Not Applicable)
http://secunia.com/advisories/31358(Not Applicable)
http://secunia.com/advisories/31365(Not Applicable)
http://secunia.com/advisories/33937(Not Applicable)
http://secunia.com/advisories/37471(Not Applicable)
http://secunia.com/advisories/38675(Not Applicable)
http://security.gentoo.org/glsa/glsa-200807-01.xml(Third Party Advisory)
http://securityreason.com/securityalert/3802(Exploit, Third Party Advisory)
http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.525289(Third Party Advisory)
http://support.apple.com/kb/HT3438(Third Party Advisory)
http://support.avaya.com/css/P8/documents/100074697(Third Party Advisory)
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0149(Broken Link)
http://www.debian.org/security/2008/dsa-1551(Third Party Advisory)
http://www.debian.org/security/2008/dsa-1620(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2008:085(Permissions Required)
http://www.securityfocus.com/archive/1/490690/100/0/threaded(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/archive/1/507985/100/0/threaded(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/bid/28715(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1019823(Broken Link, Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/usn-632-1(Third Party Advisory)
http://www.vmware.com/security/advisories/VMSA-2009-0016.html(Third Party Advisory)
http://www.vupen.com/english/advisories/2008/1229/references(Permissions Required)
http://www.vupen.com/english/advisories/2009/3316(Permissions Required)
https://exchange.xforce.ibmcloud.com/vulnerabilities/41748(Third Party Advisory, VDB Entry)
https://issues.rpath.com/browse/RPL-2444(Broken Link)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8249(Third Party Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8494(Broken Link)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9407(Third Party Advisory)

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

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