CVE-2026-42904
Medium
Elevated severity or exploit probability.
CVSS base
9.6
CRITICAL
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.4%
37.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-122
Published 2026-06-09 · modified 2026-07-23
CVSS breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
| Attack Vector | A | Adjacent |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-06-09 — Published (NVD)
- 2026-07-23 — Last modified (NVD)
Description
Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges over an adjacent network.