CVE-2018-0172
Cisco IOS and IOS XE Software
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
What it is
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).
What to do
Apply updates per vendor instructions.
Vendor notices and references
Description and required action as published by CISA. Full record at NVD.
Other Cisco entries on the list
- BroadWorks Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability CVE-2026-20320 · Nov 10, 2026
- Secure Firewall ASA Software and Cisco Secure FTD Software Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability CVE-2026-76418 · Oct 29, 2026
- Secure Email Gateway Cisco Secure Email Gateway Relative Path Traversal Vulnerability CVE-2026-76519 · Oct 14, 2026
- Catalyst SD-WAN Manager Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability CVE-2026-76504 · Sep 30, 2026
- Identity Services Engine Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability CVE-2026-76460 · Sep 16, 2026
- Secure Email Gateway Cisco Secure Email Gateway SQL Injection Vulnerability CVE-2026-76461 · Sep 14, 2026