CVE-2026-34908
Exploitation confirmed. First attested on 2026-06-09 by CISA-ADP, CISA KEV, GCVE · kevintel.
- Published2026-05-22
- Fixed in5.1.12
- WeaknessCWE-284
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2026-05-2202:16CVE publishedNVD
- 2026-06-0907:27Listed as exploited by GCVEGCVE
- 2026-06-0907:27Exploitation first reportedGCVE
- 2026-06-23Added to the CISA KEV catalogCISA KEV
- 2026-06-2317:50SSVC exploitation set to activeCISA-ADP
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-34908?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-34908?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.1 | < 5.1.12 | 5.1.12 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.1 | < 5.1.12 | 5.1.12 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.1 | < 5.1.12 | 5.1.12 | NVD |
28 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Ui enterprise fortress gateway firmware to 5.1.12
- CISA’s required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.due 2026-06-26
Advisories and patches
- community.ui.comPatch · Vendor Advisory
Detection
read 2026-10-23 19:25 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
CISA Known Exploited Vulnerability
- Date Added
- 2026-06-23
- Patch Due Date
- 2026-06-26
- Ransomware Use
- Unknown
- Required Action
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Sources
- NVDCVE recordread 2026-10-23
- CISA KEVKEV entry2026-06-23
- GCVEexploitation2026-06-09
- CISA-ADPSSVC decisionactive2026-06-23
- OpenCVESSVC decisionactive—
- CNACVSS 3.110read 2026-10-23
- CNAweakness (CWE)CWE-284read 2026-10-23
- FIRST EPSSEPSS score15.2 %read 2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- 2026-05-22
- Last Modified
- 2026-07-23
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2026-34908?
Is CVE-2026-34908 actively exploited?
What is the CVSS score for CVE-2026-34908?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.