Actively exploited · CISA KEV · NVD published 2026-05-22
Actively exploitedCVE-2026-34908
A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.
Signals
- Exploited in the wild
- Yesadded 2026-06-23 · due 2026-06-26. An observation, not a forecast.
- EPSS · 30-day forecast
- 15%Chance of exploitation in the next 30 days, 97th percentile of all CVEs. A forecast; KEV outranks it.
- CVSS · NVD · CRITICAL
- 10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Internet exposure
- not stated by sourcesNo exposure census on this CVE's dispatches.
Exploits
2 known · links onlyGitHub PoCs · by trust, then stars1
- BishopFox/CVE-2026-34908-check ↗Trust ok 100
Safely detect whether a UniFi OS Server is vulnerable to CVE-2026-34908
★ 65 · created 2026-06-05
Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.
Nuclei1
UniFi OS devices contain an improper access control vulnerability caused by insufficient authorization checks, letting network attackers make unauthorized system changes, exploit requires network access.
yaml · seen 2026-10-18
Detections
3 rules · Sigma · QRadar · CortexGenerated by skopnix from this finding, each with false-positive notes. Open the list →
On the wire
0 dispatchesNo dispatch on our wire has named this CVE yet.
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