Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software 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-2026-76493 are related to issues concerning uncaught exceptions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-248.
Published: 2026-10-21
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Immediate Patch
AI Analysis

Impact

The vulnerability arises from uncaught exceptions within Cisco Expressway Series software, which can cause the system to crash or behave unpredictably. According to the CVE report, these exceptions are classified under CWE‑248, indicating that improper exception handling leads to potential service disruption. The primary impact of exploiting this flaw is a denial of service that can render a TelePresence Video Communication Server component unavailable to users.

Affected Systems

Affected are the Cisco TelePresence Video Communication Server Expressway product line. No specific version enumeration is provided in the advisory; therefore, all releases of the Expressway series installed prior to the hardening release should be considered potentially vulnerable.

Risk and Exploitability

The CVSS score of 7.5 reflects a high risk level, though the EPSS score is not published, making precise exploitation likelihood difficult to quantify. The advisory does not list the vulnerability in the CISA KEV catalog. Attackers could potentially trigger the exception by interacting with exposed network services, but the exact vector is not specified; it is inferred that any user capable of sending malformed inputs to the server might cause the crash.

Generated by OpenCVE AI on October 22, 2026 at 04:57 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Download the latest Cisco Expressway Series Hardening Release from Cisco's official security site.
  • Deploy the update on all Expressway servers following Cisco’s installation guidelines.
  • Restart the Expressway services to apply the hardening changes.

Generated by OpenCVE AI on October 22, 2026 at 04:57 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 07 Nov 2026 18:30:00 +0000


Thu, 22 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco expressway Series
Vendors & Products Cisco
Cisco expressway Series

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. &nbsp; The vulnerabilities tracked by CVE-2026-76493 are related to issues concerning uncaught exceptions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-248.
Title Cisco Expressway Series Software Hardening Release: October 2026 - Uncaught Exception Vulnerabilities
Weaknesses CWE-248
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Cisco Expressway Series
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-11-07T17:29:43.692Z

Reserved: 2026-08-19T12:02:03.640Z

Link: CVE-2026-76493

cve-icon Vulnrichment

Updated: 2026-11-07T17:29:43.692Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T17:19:08.760

Modified: 2026-11-07T18:17:28.337

Link: CVE-2026-76493

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T10:41:02Z

Weaknesses