CVE-2026-76490

HIGH

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 r...

Affects 0 products across 1 vendor.

CVSS 3.18.6
EPSS0.4%
Percentile38th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, can impact systems beyond the vulnerable component, no confidentiality impact, no integrity impact, full availability impact.
CWE Weakness Definitions
CWE-787: Out-of-Bounds Write

Software writes data past buffer boundaries, corrupting memory and potentially enabling code execution.

◆ AI Analysis — automated analysis, not human-reviewed

A high severity vulnerability (CVE-2026-76490) affects the target system. 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 ad...

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Frequently Asked Questions
What is CVE-2026-76490?
A high severity vulnerability (CVE-2026-76490) affects the target system. 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 ad...
What is the CVSS score for CVE-2026-76490?
CVE-2026-76490 has CVSS 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS: 0.4%.
Is CVE-2026-76490 actively exploited?
No confirmed active exploitation of CVE-2026-76490 as of 2026-10-29.
How do I remediate CVE-2026-76490?
Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-exwy-hardening-FhcqBVcs
What systems are affected by CVE-2026-76490?
CVE-2026-76490 affects Cisco.
Vulnerability Details
CVE IDCVE-2026-76490
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published2026-10-21
Last Modified2026-10-22
ICS Relevance70%
Weakness (CWE)
Out-of-Bounds Write
SourceNVD
Official 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-2026-76490 are related to issues concerning out-of-bounds writes that are grouped under the Common Weakness Enumeration (CWE) Base CWE-787.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Cisco — —
Remediation
View Vendor Advisory →
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 7 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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