Cisco IOS XE vulnerabilities: known CVEs & security history
Cisco · Network / Security · 32 tracked CVEs · 2 actively exploited · updated October 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Cisco IOS XE release lines — 32 in total, with 2 actively exploited in the wild. A CVE here doesn't mean your version is affected — check Cisco IOS XE's current status and the safe version to run.
Known Cisco IOS XE CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2025-20352⚡ exploited | high | 7.7 | 39% | 2025 |
| CVE-2023-44487⚡ exploited | high | 7.5 | 100% | 2023 |
| CVE-2026-20272 | critical | 9.8 | 1% | 2026 |
| CVE-2026-20267 | critical | 9 | 0% | 2026 |
| CVE-2025-20363 | critical | 9 | 7% | 2025 |
| CVE-2026-20301 | high | 8.6 | 0% | 2026 |
| CVE-2026-20273 | high | 8.6 | 0% | 2026 |
| CVE-2026-20271 | high | 8.6 | 0% | 2026 |
| CVE-2026-20270 | high | 8.6 | 0% | 2026 |
| CVE-2026-20269 | high | 8.6 | 0% | 2026 |
| CVE-2026-20268 | high | 8.6 | 0% | 2026 |
| CVE-2026-20263 | high | 8.6 | 1% | 2026 |
| CVE-2026-20084 | high | 8.6 | — | 2026 |
| CVE-2026-20012 | high | 8.6 | 0% | 2026 |
| CVE-2025-20315 | high | 8.6 | — | 2025 |
| CVE-2025-20160 | high | 8.1 | 0% | 2025 |
| CVE-2026-20124 | high | 7.7 | 1% | 2026 |
| CVE-2025-20312 | high | 7.7 | 0% | 2025 |
| CVE-2025-20192 | high | 7.7 | — | 2025 |
| CVE-2021-1223 | high | 7.5 | 2% | 2021 |
| CVE-2026-20004 | high | 7.4 | — | 2026 |
| CVE-2025-20311 | high | 7.4 | 0% | 2025 |
| CVE-2021-1432 | high | 7.3 | 0% | 2021 |
| CVE-2023-20081 | medium | 6.8 | 1% | 2023 |
| CVE-2025-20313 | medium | 6.7 | 0% | 2025 |
| CVE-2025-20149 | medium | 6.5 | 0% | 2025 |
| CVE-2026-20104 | medium | 6.1 | — | 2026 |
| CVE-2025-20338 | medium | 6 | 0% | 2025 |
| CVE-2023-20246 | medium | 5.8 | 1% | 2023 |
| CVE-2021-1495 | medium | 5.8 | 2% | 2021 |
| CVE-2021-1224 | medium | 5.8 | 2% | 2021 |
| CVE-2021-1236 | medium | 5.3 | 2% | 2021 |
Is my Cisco IOS XE version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Cisco IOS XE version → · Monitor Cisco IOS XE for new CVEs →
Cisco IOS XE vulnerabilities — frequently asked
How many known vulnerabilities does Cisco IOS XE have?
IsItPatched tracks 32 CVEs for Cisco IOS XE, 2 of which are actively exploited (CISA KEV). 3 are critical-severity and 20 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Cisco IOS XE have any actively-exploited vulnerabilities?
Yes — 2 Cisco IOS XE CVEs are in CISA's Known Exploited Vulnerabilities catalog, meaning they are confirmed exploited in the wild. Patch these as a priority.
What is the most severe Cisco IOS XE vulnerability?
Among tracked issues, CVE-2025-20352 (HIGH, CVSS 7.7), which is actively exploited, ranks highest — a CWE-121 weakness.
Is Cisco IOS XE safe to use?
It depends on the version. The latest supported Cisco IOS XE release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Cisco IOS XE security status · Cisco IOS XE end-of-life · actively-exploited CVEs. Always verify against Cisco's advisories — see our disclaimer.