Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
IOS
Product reference — IOS by Cisco · sector: Network & Infrastructure. Cumulative disclosure record for this product across the archive.
Product totals
| All-time | YTD | |
|---|---|---|
| CVEs | 9 | 1 |
| KEV entries | 8 | 0 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 88.9 | 8.8 | .1085 | 0 | 8 | 1 | 0 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over this product's disclosures. C/H/M/L = disclosures by CVSS severity band.
Monthly disclosures
Trend (by first-seen month, full archive): █▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▂▁▁
| Month | New CVEs |
|---|---|
| 2025-11 | 0 |
| 2025-12 | 0 |
| 2026-01 | 0 |
| 2026-02 | 0 |
| 2026-03 | 0 |
| 2026-04 | 0 |
| 2026-05 | 0 |
| 2026-06 | 0 |
| 2026-07 | 0 |
| 2026-08 | 1 |
| 2026-09 | 0 |
| 2026-10 | 0 |
Notable CVEs
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2017-6736 | 8.8 | 99.4 | HIGH | YES | 2017-07-17 |
| CVE-2017-6737 | 8.8 | 98.8 | HIGH | YES | 2017-07-17 |
| CVE-2025-20352 | 7.7 | 98.6 | HIGH | YES | 2025-09-24 |
| CVE-2017-6740 | 8.8 | 95.8 | HIGH | YES | 2017-07-17 |
| CVE-2017-6738 | 8.8 | 95.7 | HIGH | YES | 2017-07-17 |
| CVE-2017-6743 | 8.8 | 95.7 | HIGH | YES | 2017-07-17 |
| CVE-2017-6744 | 8.8 | 94.2 | HIGH | YES | 2017-07-17 |
| CVE-2023-20109 | 6.6 | 84.1 | MEDIUM | YES | 2023-09-27 |
| CVE-2026-20301 | 8.6 | 45.5 | HIGH | — | 2026-08-05 |
Recent CVEs
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2026-20301 | 8.6 | 45.5 | HIGH | — | 2026-08-05 |
| CVE-2025-20352 | 7.7 | 98.6 | HIGH | YES | 2025-09-24 |
| CVE-2023-20109 | 6.6 | 84.1 | MEDIUM | YES | 2023-09-27 |
| CVE-2017-6736 | 8.8 | 99.4 | HIGH | YES | 2017-07-17 |
| CVE-2017-6737 | 8.8 | 98.8 | HIGH | YES | 2017-07-17 |
| CVE-2017-6738 | 8.8 | 95.7 | HIGH | YES | 2017-07-17 |
| CVE-2017-6740 | 8.8 | 95.8 | HIGH | YES | 2017-07-17 |
| CVE-2017-6743 | 8.8 | 95.7 | HIGH | YES | 2017-07-17 |
| CVE-2017-6744 | 8.8 | 94.2 | HIGH | YES | 2017-07-17 |
KEV entries
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2025-20352 | 2025-09-29 | 7.7 | 98.6 | HIGH |
| CVE-2023-20109 | 2023-10-10 | 6.6 | 84.1 | MEDIUM |
| CVE-2017-6736 | 2022-03-03 | 8.8 | 99.4 | HIGH |
| CVE-2017-6737 | 2022-03-03 | 8.8 | 98.8 | HIGH |
| CVE-2017-6738 | 2022-03-03 | 8.8 | 95.7 | HIGH |
| CVE-2017-6740 | 2022-03-03 | 8.8 | 95.8 | HIGH |
| CVE-2017-6743 | 2022-03-03 | 8.8 | 95.7 | HIGH |
| CVE-2017-6744 | 2022-03-03 | 8.8 | 94.2 | HIGH |
Related
Vendor: Cisco — all products and the full vendor record.
Methodology
A product is a (vendor, product) pair as named in the affected-product data. Rate statistics are arithmetic over published figures. Counts key to first-seen day. Raw counts are not comparable across products; this is a reference page assembled from the public record, not a ranking by our judgment.
Sources. CVE Program (cvelistV5), NVD (NIST), CISA KEV, FIRST EPSS.
