Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20353 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Cisco / Cisco Secure Email14.0.0-698 – 14.0.0-698
- Cisco / Cisco Secure Email13.5.1-277 – 13.5.1-277
- Cisco / Cisco Secure Email13.0.0-392 – 13.0.0-392
- Cisco / Cisco Secure Email14.2.0-620 – 14.2.0-620
- Cisco / Cisco Secure Email13.0.5-007 – 13.0.5-007
- Cisco / Cisco Secure Email13.5.4-038 – 13.5.4-038
- Cisco / Cisco Secure Email14.2.1-020 – 14.2.1-020
- Cisco / Cisco Secure Email14.3.0-032 – 14.3.0-032
- Cisco / Cisco Secure Email15.0.0-104 – 15.0.0-104
- Cisco / Cisco Secure Email15.0.1-030 – 15.0.1-030
- Cisco / Cisco Secure Email15.5.0-048 – 15.5.0-048
- Cisco / Cisco Secure Email15.5.1-055 – 15.5.1-055
- Cisco / Cisco Secure Email15.5.2-018 – 15.5.2-018
- Cisco / Cisco Secure Email16.0.0-050 – 16.0.0-050
- Cisco / Cisco Secure Email15.0.3-002 – 15.0.3-002
- Cisco / Cisco Secure Email16.0.0-054 – 16.0.0-054
- Cisco / Cisco Secure Email15.5.3-022 – 15.5.3-022
- Cisco / Cisco Secure Email16.0.1-017 – 16.0.1-017
- Cisco / Cisco Secure Email15.5.4-012 – 15.5.4-012
- Cisco / Cisco Secure Email16.0.4-016 – 16.0.4-016
- Cisco / Cisco Secure Email15.0.5-016 – 15.0.5-016
- Cisco / Cisco Secure Email16.0.2-112 – 16.0.2-112
- Cisco / Cisco Secure Email16.0.3-044 – 16.0.3-044
Updated 4m ago · 8 sources