How severe is CVE-2011-1657?

CVE-2011-1657 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-1657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1657?

CVE-2011-1657 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1657?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1657 published?

CVE-2011-1657 was published on 2011-08-25 and last updated on 2026-06-16.

CVE-2011-1657

CVE-2011-1657 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Php
Published: 2011-08-25
Last modified: 2026-06-16

Description

The (1) ZipArchive::addGlob and (2) ZipArchive::addPattern functions in ext/zip/php_zip.c in PHP 5.3.6 allow context-dependent attackers to cause a denial of service (application crash) via certain flags arguments, as demonstrated by (a) GLOB_ALTDIRFUNC and (b) GLOB_APPEND.

Frequently asked questions

What is CVE-2011-1657?: The (1) ZipArchive::addGlob and (2) ZipArchive::addPattern functions in ext/zip/php_zip.c in PHP 5.3.6 allow context-dependent attackers to cause a denial of service (application crash) via certain flags arguments, as demonstrated by (a) GLOB_ALTDIRFUNC and (b) GLOB_APPEND.
How severe is CVE-2011-1657?: CVE-2011-1657 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-1657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1657?: CVE-2011-1657 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1657 published?: CVE-2011-1657 was published on 2011-08-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:php:php:5.3.6:*:*:*:*:*:*:*

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