CVE-2026-34909
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
65.0%
99.2th percentile
CISA KEV
Listed
Added 2026-06-23 · patch by 2026-06-26
Weakness / dates
CWE-22
Published 2026-05-22 · modified 2026-07-23
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
| Attack Vector | N | Network |
| 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
- 2026-05-22 — Published (NVD)
- 2026-06-23 — Added to CISA KEV (actively exploited)
- 2026-06-26 — CISA patch-by deadline
- 2026-07-23 — Last modified (NVD)
Description
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account.