Cisco AsyncOS before 8.5.7-043, 9.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-046 on Email Security Appliance (ESA) devices mishandles malformed fields during body-contains, attachment-contains, every-attachment-contains, attachment-binary-contains, dictionary-match, and attachment-dictionary-match filtering, which allows remote attackers to cause a denial of service (memory consumption) via a crafted attachment in an e-mail message, aka Bug ID CSCuv47151.
CVE-2015-6291 is a security vulnerability that . Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.
First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2015-11-06T03:59:00.090
2025-04-12T10:46:40.837
Deferred
CVSSv2: 7.8 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | email_security_appliance | 7.7.0-000 | Yes |
| Application | cisco | email_security_appliance | 7.7.1-000 | Yes |
| Application | cisco | email_security_appliance | 8.0_base | Yes |
| Application | cisco | email_security_appliance | 8.5.6-052 | Yes |
| Application | cisco | email_security_appliance | 8.5.6-073 | Yes |
| Application | cisco | email_security_appliance | 8.5.6-074 | Yes |
| Application | cisco | email_security_appliance | 8.5.6-106 | Yes |
| Application | cisco | email_security_appliance | 8.5.6-113 | Yes |
| Application | cisco | email_security_appliance | 8.5.7-042 | Yes |
| Application | cisco | email_security_appliance | 8.5_base | Yes |
| Application | cisco | email_security_appliance | 9.0.0 | Yes |
| Application | cisco | email_security_appliance | 9.0.0-212 | Yes |
| Application | cisco | email_security_appliance | 9.0.0-461 | Yes |
| Application | cisco | email_security_appliance | 9.0.5-000 | Yes |
| Application | cisco | email_security_appliance | 9.1.0-032 | Yes |
| Application | cisco | email_security_appliance | 9.6.0-042 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.