CVE-2020-3132
A vulnerability in the email message scanning feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause a temporary denial of service (DoS) condition on an affected device. The vulnerability is due to inadequate parsing mechanisms for specific email body components. An attacker could exploit this vulnerability by sending a malicious email containing a high number of shortened URLs through an affected device. A successful exploit could allow the attacker to consume processing resources, causing a DoS condition on an affected device. To successfully exploit this vulnerability, certain conditions beyond the control of the attacker must occur.
Key facts
- CVSS score
- 5.9 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
- CWE-400
- EPSS score
- 1.5% (74th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2020-24403)
- Published
- February 19, 2020
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2020-24403 in the EU Vulnerability Database. Last updated in EUVD on November 15, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / cloud email security
- cisco / email security appliance
Certified products that may be affected
4 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Cisco Email Security Appliance with AsyncOS 13.0 - Cisco Systems, Inc. - Common Criteria 495-LSS - archived
- Cisco Email Security Appliance 9.8 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10798-2017 - archived
- Cisco Email Security Appliance v9.1 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10631-2015 - archived
- IronPort Email Security Appliances (ESA), comprising the C160, C370, X1060, and X1070 appliance models, running IronPort AsyncOS software, version 7.1, and the C670 appliance model running IronPort AsyncOS version 7.3 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10438-2010 - archived
References
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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