Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-1999-0445

In Cisco routers under some versions of IOS 12.0 running NAT, some packets may not be filtered by input access list filters.

Security Impact Summary

CVE-1999-0445 is a security vulnerability that . Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 1999, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

1999-04-01T05:00:00.000

Last Modified

2026-04-16T00:27:16.627

Status

Modified

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    NVD-CWE-Other
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios 12.0 Yes
Operating System cisco ios 12.0\(1\)w Yes
Operating System cisco ios 12.0\(1\)xa3 Yes
Operating System cisco ios 12.0\(1\)xb Yes
Operating System cisco ios 12.0\(1\)xe Yes
Operating System cisco ios 12.0\(2\)xc Yes
Operating System cisco ios 12.0\(2\)xd Yes
Operating System cisco ios 12.0\(2\)xf Yes
Operating System cisco ios 12.0\(2\)xg Yes
Operating System cisco ios 12.0db Yes
Operating System cisco ios 12.0s Yes
Operating System cisco ios 12.0t Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.