CVE-2026-76504: Cisco Catalyst SD-WAN Manager

Last refreshed2026-10-03

Status: KEV | Advisory ID: CVE-2026-76504

Key Details

CVE	CVE-2026-76504
Affected products	Cisco Catalyst SD-WAN Manager
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-177 (Improper Handling of URL Encoding (Hex Encoding))
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-09-30.
Federal remediation deadline	2026-10-03 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
Cisco	Catalyst SD-WAN Manager

Vendor

Product

Affected Versions

Patch Status

Cisco

Catalyst SD-WAN Manager

Subsystems	Industrial Network - Routers/Firewalls
Sectors	Multiple

What to Know

Cisco Catalyst SD-WAN Manager contains a hex encoding vulnerability that could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user due to improper handling of URI encoding in an HTTP request.

What to Do

Monitor Cisco's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-76504
CVE	https://www.cve.org/CVERecord?id=CVE-2026-76504

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-76504

CVE

https://www.cve.org/CVERecord?id=CVE-2026-76504

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-09-30
Required Action Due Date	2026-10-03
Required Action	Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-09-30

Required Action Due Date

2026-10-03

Required Action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.