How severe is CVE-2010-4645?

CVE-2010-4645 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2010-4645 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4645?

CVE-2010-4645 primarily affects Php. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4645?

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

When was CVE-2010-4645 published?

CVE-2010-4645 was published on 2011-01-11 and last updated on 2026-06-16.

CVE-2010-4645

CVE-2010-4645 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Php
Published: 2011-01-11
Last modified: 2026-06-16

Description

strtod.c, as used in the zend_strtod function in PHP 5.2 before 5.2.17 and 5.3 before 5.3.5, and other products, allows context-dependent attackers to cause a denial of service (infinite loop) via a certain floating-point value in scientific notation, which is not properly handled in x87 FPU registers, as demonstrated using 2.2250738585072011e-308.

Frequently asked questions

What is CVE-2010-4645?: strtod.c, as used in the zend_strtod function in PHP 5.2 before 5.2.17 and 5.3 before 5.3.5, and other products, allows context-dependent attackers to cause a denial of service (infinite loop) via a certain floating-point value in scientific notation, which is not properly handled in x87 FPU registers, as demonstrated using 2.2250738585072011e-308.
How severe is CVE-2010-4645?: CVE-2010-4645 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2010-4645 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4645?: CVE-2010-4645 primarily affects Php. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4645?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-4645 published?: CVE-2010-4645 was published on 2011-01-11 and last updated on 2026-06-16.

References

Affected products (22)

cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.12:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.13:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.14:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.15:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.16:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.3.4:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

221.161.235.168 (ipv4-addr)
103.20.122.54 (ipv4-addr)
82.199.197.245 (ipv4-addr)
58.221.244.34 (ipv4-addr)
220.88.220.59 (ipv4-addr)
211.253.10.61 (ipv4-addr)
121.78.158.30 (ipv4-addr)
121.164.135.251 (ipv4-addr)