Improper input validation in Cisco Email Security Appliance
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
A vulnerability in the email message filtering feature of Cisco AsyncOS Software for the Cisco Email Security Appliance could allow an unauthenticated, remote attacker to cause an affected device to run out of memory and stop scanning and forwarding email messages. When system memory is depleted, it can cause the filtering process to crash, resulting in a denial of service (DoS) condition on the device. This vulnerability affects software version 9.0 through the first fixed release of Cisco AsyncOS Software for Cisco Email Security Appliances, both virtual and hardware appliances, if the software is configured to apply a message filter or content filter to incoming email attachments. The vulnerability is not limited to any specific rules or actions for a message filter or content filter. Cisco Bug IDs: CSCvd29354.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco Email Security Appliance | Cisco Email Security Appliance | — | No fix listed | CNA |
- Cisco Email Security Appliance Vendor— Affected Cisco Email Security Appliance Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:asyncos:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.1:*:*:*:*:*:*:* | 9.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.1.2:*:*:*:*:*:*:* | 9.1.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.5:*:*:*:*:*:*:* | 9.5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.6:*:*:*:*:*:*:* | 9.6 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.7:*:*:*:*:*:*:* | 9.7 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:asyncos:9.8:*:*:*:*:*:*:* | 9.8 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:asyncos:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.1:*:*:*:*:*:*:* Versions 9.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.1.2:*:*:*:*:*:*:* Versions 9.1.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.5:*:*:*:*:*:*:* Versions 9.5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.6:*:*:*:*:*:*:* Versions 9.6 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.7:*:*:*:*:*:*:* Versions 9.7 Vulnerable ·Cisco
- cpe:2.3:o:cisco:asyncos:9.8:*:*:*:*:*:*:* Versions 9.8 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-12215
- 2026-10-03 Alias added: GHSA-wx6j-j2jv-h7c4
References
More Cisco Asyncos vulnerabilities
- TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
- TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2025-14683 Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2021-13698 Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2018-11020 Cisco Email Security Appliance URL Filtering Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2019-01567 Cisco Email Security Appliance Denial of Service Vulnerability CVSS 3.1HIGH 8.6
Sources
- CVE-2017-12215 · CVE Program
- CVE-2017-12215 · NVD
- FIRST EPSS
- GHSA-wx6j-j2jv-h7c4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences