CVE-2016-6455
Summary
| CVE | CVE-2016-6455 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-11-03 21:59:10 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | A vulnerability in the Slowpath of StarOS for Cisco ASR 5500 Series routers with Data Processing Card 2 (DPC2) could allow an unauthenticated, remote attacker to cause a subset of the subscriber sessions to be disconnected, resulting in a partial denial of service (DoS) condition. This vulnerability affects Cisco ASR 5500 devices with Data Processing Card 2 (DPC2) running StarOS 18.0 or later. More Information: CSCvb12081. Known Affected Releases: 18.7.4 19.5.0 20.0.2.64048 20.2.3 21.0.0. Known Fixed Releases: 18.7.4 18.7.4.65030 18.8.M0.65044 19.5.0 19.5.0.65092 19.5.M0.65023 19.5.M0.65050 20.2.3 20.2.3.64982 20.2.3.65017 20.2.a4.65307 20.3.M0.64984 20.3.M0.65029 20.3.M0.65037 20.3.M0.65071 20.3.T0.64985 20.3.T0.65031 20.3.T0.65043 20.3.T0.65067 21.0.0 21.0.0.65256 21.0.M0.64922 21.0.M0.64983 21.0.M0.65140 21.0.V0.65150 21.1.A0.64932 21.1.A0.64987 21.1.A0.65145 21.1.PP0.65270 21.1.R0.65130 21.1.R0.65135 21.1.R0.65154 21.1.VC0.65203 21.2.A0.65147. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.012430000 probability, percentile 0.793980000 (date 2026-05-10)
Problem Types: CWE-399 | unspecified
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Cisco | Asr 5000 Software | 18.0.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.0.0.57828 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.0.0.59167 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.0.0.59211 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.0.l0.59219 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.1.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.1.0.59776 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.1.0.59780 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.1_base | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.3.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.3_base | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 18.4.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.0.1 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.0.m0.60737 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.0.m0.60828 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.0.m0.61045 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.1.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.1.0.61559 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.2.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 19.3.0 | All | All | All |
| Operating System | Cisco | Asr 5000 Software | 20.0.0 | All | All | All |
| Hardware | Cisco | Asr 5500 | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | Cisco StarOS 18.x Through 21.x | affected Cisco StarOS 18.x through 21.x | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco StarOS for ASR 5500 Series Routers CVE-2016-6455 Remote Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Cisco ASR 5500 Series Router Fragmented Packet Processing Bug in StarOS Slowpath Lets Remote Users Deny Service - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Cisco ASR 5500 Series with DPC2 Cards SESSMGR Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.