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Case File

CVE-2007-1661

MEDIUM · CVSS 6.4 EPSS 2.49%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2007-11-07 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.4. It may lead to a denial-of-service condition.

CVE
CVE-2007-1661
Severity
MEDIUM
CVSS
6.4
EPSS
2.49%

Original NVD Description

Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns.