CVE-2001-0669
7.5
CVSS v2.0 Base Score
4.39%
LOW RiskEPSS (90th percentile)
NVD-CWE-Other
Various Intrusion Detection Systems (IDS) including (1) Cisco Secure Intrusion Detection System, (2) Cisco Catalyst 6000 Intrusion Detection System Module, (3) Dragon Sensor 4.x, (4) Snort before 1.8.1, (5) ISS RealSecure Network Sensor 5.x and 6.x before XPU 3.2, and (6) ISS RealSecure Server Sensor 5.5 and 6.0 for Windows, allow remote attackers to evade detection of HTTP attacks via non-standard "%u" Unicode encoding of ASCII characters in the requested URL.
Published: 10/30/2001
Modified: 6/16/2026
Vulnerability Summary
CVSS v2 Score
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS Score (Exploitation Probability)
4.39%LOW Exploitation Risk
90th percentile
This vulnerability has a 4.39% probability of being exploited in the next 30 days, ranking higher than 90% of all scored CVEs.
CWE Classification
NVD-CWE-Other