How severe is CVE-2007-1649?

CVE-2007-1649 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-1649 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-1649?

CVE-2007-1649 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-1649?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-1649 published?

CVE-2007-1649 was published on 2007-03-24 and last updated on 2026-06-16.

CVE-2007-1649

CVE-2007-1649 is a high-severity vulnerability in Php with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Php
Published: 2007-03-24
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2007-1649?: 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.
How severe is CVE-2007-1649?: CVE-2007-1649 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-1649 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1649?: CVE-2007-1649 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1649?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-1649 published?: CVE-2007-1649 was published on 2007-03-24 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*

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