Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2015-6278 — cisco / ios

Improper Input Validation

The IPv6 snooping functionality in the first-hop security subsystem in Cisco IOS 12.2, 15.0, 15.1, 15.2, 15.3, 15.4, and 15.5 and IOS XE 3.2SE, 3.3SE, 3.3XO, 3.4SG, 3.5E, and 3.6E before 3.6.3E; 3.7E before 3.7.2E; 3.9S and 3.10S before 3.10.6S; 3.11S before 3.11.4S; 3.12S and 3.13S before 3.13.3S; and 3.14S before 3.14.2S does not properly implement the Control Plane Protection (aka CPPr) feature, which allows remote attackers to cause a denial of service (device reload) via a flood of ND packets, aka Bug ID CSCus19794.

  • Published: Sep 28, 2015
  • Updated: Nov 9, 2025
  • CVE: CVE-2015-6278
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.8
  • AV:N/AC:L/Au:N/C:N/I:N/A:C

CWEs:

Software From Fixed in
cisco / ios 15.4(2)s2 15.4(2)s2.x
cisco / ios_xe 3.11s.2 3.11s.2.x
cisco / ios 15.3(2)s1 15.3(2)s1.x
cisco / ios 12.2(50)sy1 12.2(50)sy1.x
cisco / ios_xe 3.5e.2 3.5e.2.x
cisco / ios 12.2(50)sy4 12.2(50)sy4.x
cisco / ios_xe 3.3xo.2 3.3xo.2.x
cisco / ios_xe 3.2se.1 3.2se.1.x
cisco / ios 15.3(2)s 15.3(2)s.x
cisco / ios 15.0(1)sy1 15.0(1)sy1.x
cisco / ios_xe 3.4sg.3 3.4sg.3.x
cisco / ios 15.1(2)sg4 15.1(2)sg4.x
cisco / ios_xe 3.13s.0 3.13s.0.x
cisco / ios 15.1(2)sg1 15.1(2)sg1.x
cisco / ios 15.0(1)sy7a 15.0(1)sy7a.x
cisco / ios 15.2(1)sy 15.2(1)sy.x
cisco / ios 15.3(3)s5 15.3(3)s5.x
cisco / ios 15.1(2)sy3 15.1(2)sy3.x
cisco / ios_xe 3.12s.3 3.12s.3.x
cisco / ios 15.2(4)s7 15.2(4)s7.x
cisco / ios_xe 3.10s.0a 3.10s.0a.x
cisco / ios_xe 3.3se.2 3.3se.2.x
cisco / ios 15.2(1)e2 15.2(1)e2.x
cisco / ios 15.2(4)s4a 15.2(4)s4a.x
cisco / ios_xe 3.13s.1 3.13s.1.x
cisco / ios 15.2(4)s2 15.2(4)s2.x
cisco / ios_xe 3.6e.2 3.6e.2.x
cisco / ios_xe 3.4sg.1 3.4sg.1.x
cisco / ios 15.4(3)s2 15.4(3)s2.x
cisco / ios 15.0(1)sy2 15.0(1)sy2.x
cisco / ios 12.2(50)sy 12.2(50)sy.x
cisco / ios 15.1(1)sy4 15.1(1)sy4.x
cisco / ios_xe 3.4sg.4 3.4sg.4.x
cisco / ios 15.1(2)sy 15.1(2)sy.x
cisco / ios 15.2(4)s6 15.2(4)s6.x
cisco / ios_xe 3.3se.4 3.3se.4.x
cisco / ios 15.4(1)s 15.4(1)s.x
cisco / ios_xe 3.10s.0 3.10s.0.x
cisco / ios 15.3(3)s3 15.3(3)s3.x
cisco / ios 15.3(2)s0a 15.3(2)s0a.x
cisco / ios 15.3(1)s2 15.3(1)s2.x
cisco / ios_xe 3.6e.1 3.6e.1.x
cisco / ios 15.1(2)sy1 15.1(2)sy1.x
cisco / ios 15.2(2)ea1 15.2(2)ea1.x
cisco / ios 15.0(1)sy 15.0(1)sy.x
cisco / ios 15.4(1)s1 15.4(1)s1.x
cisco / ios_xe 3.12s.0 3.12s.0.x
cisco / ios 15.2(2a)e1 15.2(2a)e1.x
cisco / ios_xe 3.3xo.0 3.3xo.0.x
cisco / ios 15.0(2)se4 15.0(2)se4.x
cisco / ios 15.2(2)e2 15.2(2)e2.x
cisco / ios 15.2(1)e 15.2(1)e.x
cisco / ios 15.0(1)sy6 15.0(1)sy6.x
cisco / ios_xe 3.9s.1 3.9s.1.x
cisco / ios_xe 3.14s.1 3.14s.1.x
cisco / ios_xe 3.12s.1 3.12s.1.x
cisco / ios_xe 3.10s.01 3.10s.01.x
cisco / ios 15.1(2)sg6 15.1(2)sg6.x
cisco / ios 15.2(2)e1 15.2(2)e1.x
cisco / ios_xe 3.9s.0 3.9s.0.x
cisco / ios_xe 3.14s.0 3.14s.0.x
cisco / ios 15.0(2)ea2 15.0(2)ea2.x
cisco / ios 15.0(2)se3 15.0(2)se3.x
cisco / ios_xe 3.10s.2 3.10s.2.x
cisco / ios 12.2(50)sy3 12.2(50)sy3.x
cisco / ios 15.2(2)e 15.2(2)e.x
cisco / ios 15.0(2)ez 15.0(2)ez.x
cisco / ios 15.0(1)ex 15.0(1)ex.x
cisco / ios_xe 3.11s.0 3.11s.0.x
cisco / ios 15.0(2)se 15.0(2)se.x
cisco / ios_xe 3.4sg.2 3.4sg.2.x
cisco / ios 15.1(2)sg3 15.1(2)sg3.x
cisco / ios_xe 3.6e.2a 3.6e.2a.x
cisco / ios_xe 3.4sg.6 3.4sg.6.x
cisco / ios 15.4(1)s2 15.4(1)s2.x
cisco / ios 15.2(3)e 15.2(3)e.x
cisco / ios 15.0(1)sy3 15.0(1)sy3.x
cisco / ios_xe 3.10s.3 3.10s.3.x
cisco / ios_xe 3.6e.0b 3.6e.0b.x
cisco / ios 15.0(1)sy7 15.0(1)sy7.x
cisco / ios_xe 3.11s.1 3.11s.1.x
cisco / ios 15.1(1)sy1 15.1(1)sy1.x
cisco / ios 15.0(2)se2 15.0(2)se2.x
cisco / ios_xe 3.9s.2 3.9s.2.x
cisco / ios 15.0(1)sy4 15.0(1)sy4.x
cisco / ios 15.1(1)sy5 15.1(1)sy5.x
cisco / ios_xe 3.13s.2 3.13s.2.x
cisco / ios 15.5(1)s1 15.5(1)s1.x
cisco / ios 15.0(2)ej 15.0(2)ej.x
cisco / ios 15.4(1)s3 15.4(1)s3.x
cisco / ios 15.2(4)s3 15.2(4)s3.x
cisco / ios 15.1(1)sy 15.1(1)sy.x
cisco / ios 15.1(2)sg5 15.1(2)sg5.x
cisco / ios 15.4(2)s1 15.4(2)s1.x
cisco / ios 15.0(2)ej1 15.0(2)ej1.x
cisco / ios 15.2(3a)e 15.2(3a)e.x
cisco / ios_xe 3.6e.0 3.6e.0.x
cisco / ios_xe 3.2se.2 3.2se.2.x
cisco / ios 15.0(2)se8 15.0(2)se8.x
cisco / ios 15.1(2)sy4a 15.1(2)sy4a.x
cisco / ios_xe 3.4sg.0 3.4sg.0.x
cisco / ios 15.0(2a)ex5 15.0(2a)ex5.x
cisco / ios 15.1(2)sy2 15.1(2)sy2.x
cisco / ios 15.3(3)s4 15.3(3)s4.x
cisco / ios 15.3(2)s2 15.3(2)s2.x
cisco / ios 15.0(2)se1 15.0(2)se1.x
cisco / ios 15.2(1)e3 15.2(1)e3.x
cisco / ios 15.4(2)s 15.4(2)s.x
cisco / ios_xe 3.7e.0 3.7e.0.x
cisco / ios 15.2(4)s4 15.2(4)s4.x
cisco / ios 15.4(3)s 15.4(3)s.x
cisco / ios_xe 3.10s.1 3.10s.1.x
cisco / ios_xe 3.5e.0 3.5e.0.x
cisco / ios_xe 3.3se.0 3.3se.0.x
cisco / ios_xe 3.4sg.5 3.4sg.5.x
cisco / ios 15.0(2)se7 15.0(2)se7.x
cisco / ios_xe 3.3se.3 3.3se.3.x
cisco / ios 15.2(3)e1 15.2(3)e1.x
cisco / ios 15.0(2)se6 15.0(2)se6.x
cisco / ios 12.2(50)sy2 12.2(50)sy2.x
cisco / ios 15.3(1)s 15.3(1)s.x
cisco / ios_xe 3.6e.0a 3.6e.0a.x
cisco / ios 15.5(1)s 15.5(1)s.x
cisco / ios 15.1(2)sg 15.1(2)sg.x
cisco / ios 15.2(4)s1 15.2(4)s1.x
cisco / ios 15.1(2)sy4 15.1(2)sy4.x
cisco / ios_xe 3.5e.1 3.5e.1.x
cisco / ios_xe 3.3se.1 3.3se.1.x
cisco / ios_xe 3.2se.3 3.2se.3.x
cisco / ios 15.3(3)s1 15.3(3)s1.x
cisco / ios_xe 3.2se.0 3.2se.0.x
cisco / ios_xe 3.11s.3 3.11s.3.x
cisco / ios 15.1(2)sy5 15.1(2)sy5.x
cisco / ios 15.0(1)sy5 15.0(1)sy5.x
cisco / ios 15.3(3)s 15.3(3)s.x
cisco / ios 15.2(1)e1 15.2(1)e1.x
cisco / ios_xe 3.12s.2 3.12s.2.x
cisco / ios_xe 3.3xo.1 3.3xo.1.x
cisco / ios 15.1(1)sy3 15.1(1)sy3.x
cisco / ios 15.4(3)s1 15.4(3)s1.x
cisco / ios 15.0(2)se5 15.0(2)se5.x
cisco / ios_xe 3.10s.4 3.10s.4.x
cisco / ios_xe 3.5e.3 3.5e.3.x
cisco / ios 15.4(2)s3 15.4(2)s3.x
cisco / ios 15.3(3)s2 15.3(3)s2.x
cisco / ios 15.2(4)s3a 15.2(4)s3a.x
cisco / ios 15.0(1)sy8 15.0(1)sy8.x
cisco / ios_xe 3.10s.5 3.10s.5.x
cisco / ios_xe 3.7e.1 3.7e.1.x
cisco / ios 15.1(2)sg2 15.1(2)sg2.x
cisco / ios 15.2(1)sy0a 15.2(1)sy0a.x
cisco / ios 15.1(1)sy2 15.1(1)sy2.x
cisco / ios_xe 3.3se.5 3.3se.5.x
cisco / ios 15.2(4)s5 15.2(4)s5.x
cisco / ios 15.2(4)s 15.2(4)s.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.