SEPTEMBER 15, 2026
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Case File

CVE-2026-20353

CRITICAL · CVSS 9.8

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

Cisco Secure Email Gateway and Cisco Secure Email and Web Manager are vulnerable due to improper resource control throughout their lifecycle, which could lead to unauthorized access or manipulation of sensitive data. The critical severity of this vulnerability (CVSS 9.8) necessitates immediate attention from organizations using these products to mitigate potential exploitation risks. Security teams should prioritize patching and updating their systems to safeguard against potential breaches.

CVE
CVE-2026-20353
Severity
CRITICAL
CVSS
9.8
EPSS
N/A
Cisco

Original NVD 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.