CVE-2026-20353
CriticalCVSS 9.8Summary
The vulnerabilities tracked by CVE-2026-20353 relate to improper control of a resource through its lifetime grouped under CWE Pillar CWE-664 and were found during Cisco's internal security review. They affect Cisco Secure Email Gateway and Cisco Secure Email and Web Manager.
Risk Assessment
Improper resource lifecycle management may lead to resource leaks or unpredictable behavior that could be exploited by an attacker.
Recommendation
Apply the Cisco software hardening releases for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager.
Other vulnerabilities in Cisco Secure Email Gateway and Cisco Secure Email and Web Manager
See all- CVE-2026-76443Critical
The vulnerabilities tracked by CVE-2026-76443 relate to improper neutralization issues grouped under CWE Pillar CWE-707 and were found during Cisco's internal security review. They affect Cisco Secure Email Gateway and Cisco Secure Email and Web Manager.
- CVE-2026-76441Critical
The vulnerabilities tracked by CVE-2026-76441 relate to improper access control issues grouped under CWE Pillar CWE-284 and were found during Cisco's internal security review. They affect Cisco Secure Email Gateway and Cisco Secure Email and Web Manager.
- CVE-2026-76440Critical
The vulnerabilities tracked by CVE-2026-76440 relate to path traversal issues grouped under CWE Pillar CWE-23 and were found during Cisco's internal security review. They affect Cisco Secure Email Gateway and Cisco Secure Email and Web Manager.
Original NVD description (English source)
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.