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CVE-2026-76497

Cisco Expressway Series Software Hardening Release: October 2026 - Insecure Temporary File Vulnerabilities

CVSS score

6.6

EPSS probability

—

Risk score

0.7

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-76497: Cisco Expressway Series Software Hardening Releases

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

Tracked as CVE-2026-76497, this vulnerability relates to insecure temporary files grouped under CWE-377 in the Cisco Expressway Series software, identified during an internal security review.

Why does it matter?

This vulnerability introduces security flaws that can compromise the integrity and availability of affected systems. It requires local user privileges, which shapes its attack surface.

What should be done?

  • Follow vendor security advisories
  • Apply hardening updates and patches
  • Update affected product versions
Chain of evidence and sources2 verified claims

CVE-2026-76497, Cisco Expressway Series yazılımındaki güvenli olmayan geçici dosyalarla ilgilidir.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet CWE-377 zayıflık sınıfı altında gruplandırılmıştır ve CVSS taban puanı 6.6 olarak belirlenmiştir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

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-2026-76497 are related to issues concerning insecure temporary files that are grouped under the Common Weakness Enumeration (CWE) Base CWE-377.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

CWE: CWE-377

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-76497 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ciscoCisco TelePresence Video Communication Server (VCS) Expressway View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.6CVSS V3_1MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:HCVE CNA
6.6CVSS V31MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-76497 is associated with the following CWEs:

CWE-377: Common Weakness Enumeration Entry CWE-377

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-76497 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsLow
UserGerekiyor

Official Sources and Advisories

cisco-sa-exwy-hardening-FhcqBVcsvendor-advisory

CVSS Vector Radar Chart

6.6 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.RequiredConfidentialityLowIntegrityHighAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow privileges
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)High
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-377

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CVE-2026-76497 · Cisco Expressway Series Software Hardening…