CVE-2007-1660

CVE-2007-1660 is a medium-severity vulnerability in Pcre with a CVSS 2.0 base score of 6.8. 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-119.

Key facts

Description

Perl-Compatible Regular Expression (PCRE) library before 7.0 does not properly calculate sizes for unspecified "multiple forms of character class", which triggers a buffer overflow that allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code.

Frequently asked questions

What is CVE-2007-1660?
Perl-Compatible Regular Expression (PCRE) library before 7.0 does not properly calculate sizes for unspecified "multiple forms of character class", which triggers a buffer overflow that allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code.
How severe is CVE-2007-1660?
CVE-2007-1660 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2007-1660 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1660?
CVE-2007-1660 affects Pcre. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1660?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-1660 published?
CVE-2007-1660 was published on 2007-11-07 and last updated on 2026-06-16.

References

Affected products (1)

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