Product / Cisco
Cisco IOS and IOS XE in CISA KEV
Answer CISA's KEV catalog lists 4 vulnerabilities in Cisco IOS and IOS XE as of catalog 2026.09.23, 4% of Cisco's 99 entries. First added 2021-11-03, latest 2025-09-29; 0 ransomware-linked.
- KEV entries
- 4
- Ransomware: known
- 00%
- First added
- 2021-11-03
- Latest added
- 2025-09-29
- Median days to due
- 21
- Open deadlines
- 0federal
TAdditions by year
| Year | Added |
|---|---|
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 0 |
| 2025 | 1 |
| 2026 | 0 |
WWeaknesses
| CWE | Entries | Share |
|---|---|---|
| CWE-20 Improper input validation | 2 | 50% |
| CWE-121 Stack-based buffer overflow | 1 | 25% |
| CWE-787 Out-of-bounds write | 1 | 25% |
EAll entries
| CVE | Vulnerability | Added | Due | Ransomware | CWE |
|---|---|---|---|---|---|
| CVE-2025-20352 | Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability | Unknown | CWE-121 | ||
| CVE-2023-20109 | Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability | Unknown | CWE-787 | ||
| CVE-2017-3881 | Cisco IOS and IOS XE Remote Code Execution Vulnerability | Unknown | CWE-20 | ||
| CVE-2018-0171 | Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability | Unknown | CWE-20 |
Cite this
CISA's KEV catalog lists 4 vulnerabilities in Cisco IOS and IOS XE. Source: Telemetry analysis of the CISA Known Exploited Vulnerabilities catalog, version 2026.09.23 (released 2026-09-23). https://glide-telemetry.pages.dev/products/cisco-ios-and-ios-xe/
Source: CISA KEV catalog v2026.09.23, released 2026-09-23. Windows end 2026-09-23.