Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since September 30, 2026.
CVE-2026-76504
Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
Cisco · Catalyst SD-WAN Manager
Added to KEV September 30, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-76504
- CWE
- CWE-177
- Affected products
- Catalyst SD-WAN Manager · Cisco Catalyst SD-WAN Manager · Cisco
What happened
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 it means for your business
Cisco Catalyst SD-WAN Manager is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-76504). 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. CISA remediation due date: 2026-10-03. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: October 3, 2026
Sources
Related briefs
Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
Cisco Identity Services Engine is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-76460). Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) contain an incorrect use of privileged APIs vulnerability that could allow an unauthenticated, remote attacker to gain unauthorized access to the affected device by bypassing the web-based management interface. CISA remediation due date: 2026-09-19. If you need help checking exposure, call (864) 335-9223.
Cisco Secure Email Gateway SQL Injection Vulnerability
Cisco Secure Email Gateway is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-76461). Cisco AsyncOS software for Cisco Secure Email Gateway (SEG) contains a SQL injection vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system. CISA remediation due date: 2026-09-17. If you need help checking exposure, call (864) 335-9223.
Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-20079). Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain an authentication Bypass using an alternate path or channel vulnerability that could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system. CISA remediation due date: 2026-09-12. If you need help checking exposure, call (864) 335-9223.
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-88779). Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway) contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for a denial of service. CISA remediation due date: 2026-10-07. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.