Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2016-1407

Cisco IOS XR through 5.3.2 mishandles Local Packet Transport Services (LPTS) flow-base entries, which allows remote attackers to cause a denial of service (session drop) by making many connection attempts to open TCP ports, aka Bug ID CSCux95576.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 7 products from cisco, from cisco, from cisco and 4 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2016-05-25T01:59:10.773

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

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

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

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr 2.0.0 Yes
Operating System cisco ios_xr 3.0.0 Yes
Operating System cisco ios_xr 3.0.1 Yes
Operating System cisco ios_xr 3.2.0 Yes
Operating System cisco ios_xr 3.2.1 Yes
Operating System cisco ios_xr 3.2.2 Yes
Operating System cisco ios_xr 3.2.3 Yes
Operating System cisco ios_xr 3.2.4 Yes
Operating System cisco ios_xr 3.2.6 Yes
Operating System cisco ios_xr 3.2.50 Yes
Operating System cisco ios_xr 3.3.0 Yes
Operating System cisco ios_xr 3.3.1 Yes
Operating System cisco ios_xr 3.3.2 Yes
Operating System cisco ios_xr 3.3.3 Yes
Operating System cisco ios_xr 3.3.4 Yes
Operating System cisco ios_xr 3.4.0 Yes
Operating System cisco ios_xr 3.4.1 Yes
Operating System cisco ios_xr 3.4.2 Yes
Operating System cisco ios_xr 3.4.3 Yes
Operating System cisco ios_xr 3.5.0 Yes
Operating System cisco ios_xr 3.5.2 Yes
Operating System cisco ios_xr 3.5.3 Yes
Operating System cisco ios_xr 3.5.4 Yes
Operating System cisco ios_xr 3.6.0 Yes
Operating System cisco ios_xr 3.6.1 Yes
Operating System cisco ios_xr 3.6.2 Yes
Operating System cisco ios_xr 3.6.3 Yes
Operating System cisco ios_xr 3.6_base Yes
Operating System cisco ios_xr 3.7.0 Yes
Operating System cisco ios_xr 3.7.1 Yes
Operating System cisco ios_xr 3.7.2 Yes
Operating System cisco ios_xr 3.7.3 Yes
Operating System cisco ios_xr 3.7_base Yes
Operating System cisco ios_xr 3.8.0 Yes
Operating System cisco ios_xr 3.8.1 Yes
Operating System cisco ios_xr 3.8.2 Yes
Operating System cisco ios_xr 3.8.3 Yes
Operating System cisco ios_xr 3.8.4 Yes
Operating System cisco ios_xr 3.9.0 Yes
Operating System cisco ios_xr 3.9.1 Yes
Operating System cisco ios_xr 3.9.2 Yes
Operating System cisco ios_xr 3.9.3 Yes
Operating System cisco ios_xr 4.0.0 Yes
Operating System cisco ios_xr 4.0.1 Yes
Operating System cisco ios_xr 4.0.2 Yes
Operating System cisco ios_xr 4.0.3 Yes
Operating System cisco ios_xr 4.0.4 Yes
Operating System cisco ios_xr 4.0.11 Yes
Operating System cisco ios_xr 4.0_base Yes
Operating System cisco ios_xr 4.1.0 Yes
Operating System cisco ios_xr 4.1.1 Yes
Operating System cisco ios_xr 4.1.2 Yes
Operating System cisco ios_xr 4.1_base Yes
Operating System cisco ios_xr 4.2.0 Yes
Operating System cisco ios_xr 4.2.1 Yes
Operating System cisco ios_xr 4.2.2 Yes
Operating System cisco ios_xr 4.2.3 Yes
Operating System cisco ios_xr 4.2.4 Yes
Operating System cisco ios_xr 4.3.0 Yes
Operating System cisco ios_xr 4.3.1 Yes
Operating System cisco ios_xr 4.3.2 Yes
Operating System cisco ios_xr 4.3.3 Yes
Operating System cisco ios_xr 4.3.4 Yes
Operating System cisco ios_xr 5.0.0 Yes
Operating System cisco ios_xr 5.0.1 Yes
Operating System cisco ios_xr 5.0_base Yes
Operating System cisco ios_xr 5.1.0 Yes
Operating System cisco ios_xr 5.1.1.k9sec Yes
Operating System cisco ios_xr 5.1.2 Yes
Operating System cisco ios_xr 5.1.3 Yes
Operating System cisco ios_xr 5.2.0 Yes
Operating System cisco ios_xr 5.2.1 Yes
Operating System cisco ios_xr 5.2.2 Yes
Operating System cisco ios_xr 5.2.3 Yes
Operating System cisco ios_xr 5.2.4 Yes
Operating System cisco ios_xr 5.2.5 Yes
Operating System cisco ios_xr 5.3.0 Yes
Operating System cisco ios_xr 5.3.1 Yes
Operating System cisco ios_xr 5.3.2 Yes
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9922 - No
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.