CVE-2016-6438
Summary
| CVE | CVE-2016-6438 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-10-27 21:59:09 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | A vulnerability in Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause a configuration integrity change to the vty line configuration on an affected device. This vulnerability affects the following releases of Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers: All 3.16S releases, All 3.17S releases, Release 3.18.0S, Release 3.18.1S, Release 3.18.0SP. More Information: CSCuz62815. Known Affected Releases: 15.5(3)S2.9, 15.6(2)SP. Known Fixed Releases: 15.6(1.7)SP1, 16.4(0.183), 16.5(0.1). |
Risk And Classification
Primary CVSS: v3.0 5.9 MEDIUM from [email protected]
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.003740000 probability, percentile 0.591220000 (date 2026-05-09)
Problem Types: CWE-264 | unspecified
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 5.9 | MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 2.0 | [email protected] | Primary | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
NoneIntegrity
PartialAvailability
NoneAV:N/AC:M/Au:N/C:N/I:P/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Cisco | Ios Xe | 3.16.0cs | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.0s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.1as | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.1s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.2as | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.2bs | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.2s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.3as | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.3s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.16.4s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.17.0s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.17.1as | All | All | All |
| Operating System | Cisco | Ios Xe | 3.17.1s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.17.2s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.18.0s | All | All | All |
| Operating System | Cisco | Ios Xe | 3.18.0sp | All | All | All |
| Operating System | Cisco | Ios Xe | 3.18.1s | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | Cisco IOS XE 3.16S 3.17S 3.18.0S 3.18.1S 3.18.0SP | affected Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco IOS XE Software CVE-2016-6438 Remote Security Bypass Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Cisco IOS XE on cBR-8 Converged Broadband Routers Lets Remote Users Affect vty Configuration Integrity - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Cisco cBR-8 Converged Broadband Router vty Integrity 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.