Is CVE-2011-1471 in the CISA KEV catalog?

No. CVE-2011-1471 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1471?

CVE-2011-1471 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2011-1471?

CVE-2011-1471 has an EPSS score of 13.13% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2011-1471

MEDIUMEPSS 96th pctl

4.3

CVSS v2

NVD

Description

Integer signedness error in zip_stream.c in the Zip extension in PHP before 5.3.6 allows context-dependent attackers to cause a denial of service (CPU consumption) via a malformed archive file that triggers errors in zip_fread function calls.

CWE-189

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.13%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

http://bugs.php.net/bug.php?id=49072
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://support.apple.com/kb/HT5002
http://www.debian.org/security/2011/dsa-2266
http://www.mandriva.com/security/advisories?name=MDVSA-2011:052
http://www.mandriva.com/security/advisories?name=MDVSA-2011:053
http://www.php.net/ChangeLog-5.php
http://www.redhat.com/support/errata/RHSA-2011-1423.html
http://www.securityfocus.com/bid/46975
http://www.vupen.com/english/advisories/2011/0744

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.