CVE-2026-33824
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
72.7%
99.4th percentile
CISA KEV
Listed
Added 2026-08-18 · patch by 2026-08-21
Weakness / dates
CWE-415
Published 2026-04-14 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-04-14 — Published (NVD)
- 2026-08-18 — Added to CISA KEV (actively exploited)
- 2026-08-21 — CISA patch-by deadline
- 2026-08-19 — Last modified (NVD)
Description
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.