Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CWE-821
Weakness type CWE-821 — authoritative definition at MITRE. A cumulative reference aggregating every published CVE mapped to this weakness class; not a page of record.
Totals
| CVEs all-time | CVEs YTD | KEV all-time |
|---|---|---|
| 3 | 3 | 0 |
Monthly trend
██▁█▁▁
2026-05 1 · 2026-06 1 · 2026-07 0 · 2026-08 1 · 2026-09 0 · 2026-10 0
Top CVEs
| CVE | CVSS | EPSS %ile | KEV | Title |
|---|---|---|---|---|
| CVE-2026-43198 | 9.8 | 31.3 | — | tcp: fix potential race in tcp_v6_syn_recv_sock() |
| CVE-2026-77584 | 8.2 | 14.8 | — | — |
| CVE-2026-56132 | 6.9 | 0.9 | — | — |
Most-affected vendors
| Vendor | CVEs |
|---|---|
| libexpat project | 1 |
| linux | 1 |
| torproject | 1 |
