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10.0
CVE-2026-34908KEVEXPLOITEDPATCHED
ubiquiti · unifi os

CVE-2026-34908: A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS de

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.

Affected Products

VendorProductVersions
ubiquitiunifi os0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5.0.6, 5.0.8, 5.1.10, 5.1.11, 5.1.12, 1.61.3, 4.0.14

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
ubiquitiunificert_advisory90%

References

  • https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Related News (6 articles)

Tier B
CCCS Canada1d ago
Ubiquiti security advisory (AV26-589)
→ No new info (linked only)
Tier D
BleepingComputer4d ago
Critical UniFi OS bug lets hackers gain root without authentication
→ No new info (linked only)
Tier D
Heise Security17d ago
UniFi OS Server: Kritische Sicherheitslücken ermöglichen Angriffe
→ No new info (linked only)
Tier B
CCCS Canada21d ago
Ubiquiti security advisory (AV26-498)
→ No new info (linked only)
Tier B
BSI Advisories22d ago
[NEU] [hoch] Ubiquiti UniFi OS Server: Mehrere Schwachstellen
→ No new info (linked only)
Tier C
VulDB22d ago
CVE-2026-34908 | Ubiquiti UniFi OS Server prior 5.0.8 access control
→ No new info (linked only)
CVSS 3.110.0 CRITICAL
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA KEV✅ Yes
Actively exploited✅ Yes
Patch available
5.1.12
CWECWE-284
PublishedMay 22, 2026
Last enriched1d agov5
Tags
remote code executionauthentication bypass
Trending Score108🔥
Source articles6
Independent5
Info Completeness11/14
Missing: epss, exploit, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-47370EXP
CVE-2026-47370: A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability
Trending: 57
HIGHCVE-2026-48610EXP
CVE-2026-48610: Under certain network configurations, a malicious actor with access to network could exploit an Improper Access Control
Trending: 43
CRITICALCVE-2026-47369
CVE-2026-47369: A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability
Trending: 42
HIGHCVE-2026-47368
CVE-2026-47368: A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices runni
Trending: 24
CRITICALCVE-2026-34910EXPKEV
CVE-2026-34910: A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS
Trending: 11

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
May 22, 2026
Added to CISA KEV
May 22, 2026
Discovered by ZDM
May 22, 2026
Updated: affectedVersions, activelyExploited
May 22, 2026
Updated: affectedVersions, patchAvailable
May 22, 2026
Actively Exploited
May 23, 2026
Patch Available
May 23, 2026
Updated: affectedVersions, iocs, tags
Jun 8, 2026
Updated: affectedVersions, patchAvailable
Jun 11, 2026

Version History

v5
Last enriched 1d ago
v5Tier B1d ago

Updated affected versions to include 5.0.8 and newer versions, and changed the patch available to 5.1.12.

affectedVersionspatchAvailable
via CCCS Canada
v4Tier D4d ago

Updated description with detailed technical information, added affected version 5.0.6, marked exploit as available, and included new IoCs and tags.

affectedVersionsiocstags
via BleepingComputer
v3Tier B21d ago

Updated affected versions to include 5.0.6 and corrected patch available version to 5.0.6.

affectedVersionspatchAvailable
via CCCS Canada
v2Tier C22d ago

Updated affected versions with additional products and marked the vulnerability as actively exploited.

affectedVersionsactivelyExploited
via VulDB
v122d ago

Initial creation