How severe is CVE-2007-1659?

CVE-2007-1659 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2007-1659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-1659?

CVE-2007-1659 affects Pcre. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-1659?

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

When was CVE-2007-1659 published?

CVE-2007-1659 was published on 2007-11-07 and last updated on 2026-06-16.

CVE-2007-1659

CVE-2007-1659 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

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Pcre
Published: 2007-11-07
Last modified: 2026-06-16

Description

Perl-Compatible Regular Expression (PCRE) library before 7.3 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via regex patterns containing unmatched "\Q\E" sequences with orphan "\E" codes.

Frequently asked questions

What is CVE-2007-1659?: Perl-Compatible Regular Expression (PCRE) library before 7.3 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via regex patterns containing unmatched "\Q\E" sequences with orphan "\E" codes.
How severe is CVE-2007-1659?: CVE-2007-1659 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2007-1659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1659?: CVE-2007-1659 affects Pcre. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-1659 published?: CVE-2007-1659 was published on 2007-11-07 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:pcre:pcre:*:*:*:*:*:*:*:*

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