CVE-2026-72971
Low
No strong exploitation signal.
CVSS base
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
0.5%
40.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-59
Published 2026-08-11 · modified 2026-08-14
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2026-08-11 — Published (NVD)
- 2026-08-14 — Last modified (NVD)
Description
Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.