Is CVE-2001-0669 actively exploited?

CVE-2001-0669 has no public evidence of in-the-wild exploitation as of 2025-04-03.

What is the CVSS score for CVE-2001-0669?

CVE-2001-0669 has a CVSS score of 7.5 (UNKNOWN severity). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P.

How do I patch CVE-2001-0669?

Patch guidance is available from cisco security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2001-0669.

CVE-2001-0669 - remediation guidance & executive summary

Q: Which products are affected by CVE-2001-0669?

8 products: cisco catalyst 6000 intrusion detection system module, cisco secure intrusion detection system, iss realsecure network sensor, iss realsecure network sensor, iss realsecure server sensor, and 3 more.

Description

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.

CVSS Metrics

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector: network
Access Cmplx: low
Auth: none
Confidentiality: partial
Integrity: partial
Availability: partial
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: CISCO
Published: 10/30/2001
Last Modified: 4/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cisco : catalyst_6000_intrusion_detection_system_modulecisco : secure_intrusion_detection_systemiss : realsecure_network_sensoriss : realsecure_network_sensoriss : realsecure_server_sensoriss : realsecure_server_sensorsnort : snortenterasys : dragon

Remediation Guidance

Executive Summary

View on NIST NVD