CVE-2016-6407
Summary
| CVE | CVE-2016-6407 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-09-17 02:59:02 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | Cisco AsyncOS through 9.5.0-444 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (link saturation) by making many HTTP requests for overlapping byte ranges simultaneously, aka Bug ID CSCuz27219. |
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: 0.007490000 probability, percentile 0.732160000 (date 2026-05-06)
Problem Types: CWE-399 | n/a
| 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 |
|---|---|---|---|---|---|---|
| Application | Cisco | Web Security Appliance | 5.6.0-623 | All | All | All |
| Application | Cisco | Web Security Appliance | 6.0.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.1.0 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.1.1 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.1.2 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.1.3 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.1.4 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.5.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.5.0-825 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.5.1-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.5.2-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.5.2-hp2-303 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.7.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.7.0-608 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.7.1-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 7.7.5-835 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.5 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.6 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.6-078 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.6-119 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.7 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.7-142 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.0.8-mr-113 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.0-497 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.0.000 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.1-021 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.2-024 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.2-027 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.5.3-055 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.8.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 8.8.0-085 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.0.0-193 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.0_base | All | All | All |
| Application | Cisco | Web Security Appliance | 9.1.0-000 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.1.0-070 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.1_base | All | All | All |
| Application | Cisco | Web Security Appliance | 9.5.0-235 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.5.0-284 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.5.0-444 | All | All | All |
| Application | Cisco | Web Security Appliance | 9.5_base | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco Web Security Appliance HTTP Request Forwarding Lets Remote Users Consume Excessive Network Resources - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Cisco Web Security Appliance HTTP Load Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| Cisco Web Security Appliance CVE-2016-6407 Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| 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.