Actively exploited vulnerability

CVE-2008-4128: Cisco IOS Cross-Site Request Forgery Vulnerability

Cisco IOS 12.4 contains multiple cross-site forgery vulnerabilities that allows remote attackers to execute arbitrary commands via (1) a certain "show privilege" command to the /level/15/exec/- URI, and (2) a certain "alias exec" command to the /level/15/exec/-/configure/http URI.

CISA KEV source 13 Jul 2026 added 16 Jul 2026 remediation due

Affected product

Cisco · IOS

Known ransomware use: Unknown

Required action

Follow the source advisory and validate exposure in your environment.

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.

Related Yasna coverage

Recent reporting that mentions CVE-2008-4128.

Security Affairs14 Jul 2026

U.S. CISA adds a Cisco IOS flaw to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a Cisco IOS flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a Cisco IOS flaw, tracked as CVE-2008-4128, to its Known Exploited Vulnerabilities (KEV) catalog. Cisco IOS 12.4 running on Cisco 871 Integrated Services Routers contains multiple CSRF flaws in […]