CVE-2016-6372
Summary
| CVE | CVE-2016-6372 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-10-28 10:59:11 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | A vulnerability in the email message and content filtering for malformed Multipurpose Internet Mail Extensions (MIME) headers of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) and Web Security Appliances (WSA) could allow an unauthenticated, remote attacker to bypass the filtering functionality of the targeted device. Emails that should have been quarantined could instead be processed. Affected Products: This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for Cisco ESA and Cisco WSA on both virtual and hardware appliances that are configured with message or content filters to scan incoming email attachments. More Information: CSCuy54740, CSCuy75174. Known Affected Releases: 9.7.1-066 9.5.0-575 WSA10.0.0-000. Known Fixed Releases: 10.0.0-125 9.1.1-038 9.7.2-047. |
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:H/I:N/A:N
EPSS: 0.002700000 probability, percentile 0.504710000 (date 2026-05-09)
Problem Types: CWE-20 | 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:H/I:N/A:N |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
NoneAvailability
NoneAV:N/AC:L/Au:N/C:P/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cisco | Email Security Appliance | 8.0.1-023 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.0_base | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.0-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.0-er1-198 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.6-052 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.6-073 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.6-074 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.6-106 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.6-113 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.5.7-042 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.6.0 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.6.0-011 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.9.0 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.9.1-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 8.9.2-032 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.0.0 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.0.0-212 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.0.0-461 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.0.5-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.1.0 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.1.0-011 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.1.0-032 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.1.0-101 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.1.1-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.4.0 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.4.4-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.5.0-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.5.0-201 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.6.0-000 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.6.0-042 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.6.0-051 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.7.0-125 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.7.1-066 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.9.6-026 | All | All | All |
| Application | Cisco | Email Security Appliance | 9.9_base | All | All | All |
| 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 |
| Application | Cisco | Web Security Appliance 8.0.5 | hot_patch_1 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Na | Cisco AsyncOS Through WSA10.0.0-000 | affected Cisco AsyncOS through WSA10.0.0-000 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco Web Security Appliance Lets Remote Users Bypass Email Message and Content - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Cisco Email and Web Security Appliance MIME Header Bypass Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | tools.cisco.com | Vendor Advisory |
| Cisco Email Security Appliance Lets Remote Users Bypass Email Message and Content Filters - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| Cisco AsyncOS for Email and Web Security Appliances Remote Security Bypass 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.