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CVE-2026-34908: Ubiquiti Networks UniFi OS Server access control ...
CVE-2026-34908, a CVSS 10.0 access-control bypass in Ubiquiti UniFi OS, was added to CISA's KEV catalog amid reported active exploitation.
CISA added CVE-2026-34908 to the Known Exploited Vulnerabilities catalog on June 23, 2026, with remediation due June 26 under BOD 26-04 guidance. The CVSS 10.0 improper access control flaw (CWE-284) in Ubiquiti UniFi OS allows unauthorized system changes without authentication. Multiple news reports referenced by the page describe the max-severity UniFi flaws being exploited in attacks, and an official patch is available.
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Troy Hunt
Troy Hunt warns ShinyHunters' Carhartt breach claim of 50GB and millions of records is unverified, while Sri Lanka joins Have I Been Pwned.
Troy Hunt's blog roundup centers on a cautionary tale about data breach claims: ShinyHunters claims it compromised Carhartt and stole over 50GB of compressed data containing millions of customer records, employee information and loyalty data, but Hunt stresses criminal claims require verification. The feed also covers Sri Lanka CERT becoming the 48th government onboarded to Have I Been Pwned's free government monitoring service, following Nepal as the 47th. Other commentary addresses ransomware economics, Brinks Home's lawyer-heavy extortion FAQ, and the Origin Energy breach in Australia.
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Ubiquiti Patches Critical UniFi Flaws Across Connect, Talk, Access, Protect, and OS
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U.S. CISA adds Ubiquiti UniFi OS and Lantronix EDS5000 plugin flaws to its Known Exploited Vulnerabilities catalog
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Ubiquiti Patches Critical UniFi OS Flaws Allowing Command Injection and Privilege Escalation
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CVE-2026-34908: UniFi OS Auth Bypass Vulnerability
Ubiquiti disclosed CVE-2026-34908, a CVSS 10.0 authentication bypass in UniFi OS letting network-adjacent attackers alter device configuration without credentials.
CVE-2026-34908 is an improper access control flaw (CWE-284) in Ubiquiti UniFi OS devices, disclosed in UI Security Advisory Bulletin 064, with a CVSS 3.1 base score of 10.0. An unauthenticated network-adjacent attacker can bypass access controls and modify system configuration, with scope-changed impact on downstream network services such as routing, VPN, and connected access points. Fixed firmware is available, and workarounds include restricting management ports to trusted subnets, isolating management interfaces on a dedicated VLAN, and disabling remote access features. No public proof-of-concept code was observed at the time of publication.
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⚡ Weekly Recap: SharePoint 0-Day, Chrome Exploit, macOS Spyware, NVIDIA Toolkit RCE and More
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Ubiquiti security advisory (AV26-850)
Canada's Cyber Centre reports critical vulnerabilities across Ubiquiti UniFi products including UniFi OS Server, Network, Protect, and Access; updates required.
The Canadian Centre for Cyber Security (AV26-850) reports critical vulnerabilities affecting numerous Ubiquiti products, including UniFi OS Server (<=5.1.21), UniFi Network Application (<=10.4.57), UniFi Protect Application (<=7.1.87), and UniFi Access Application (<=4.3.3). Other affected products include UniFi Connect, UID Enterprise Agent, UniFi Talk, UniFi Protect AI Key, Connect Display Cast Pro, and Enterprise Audio/Video Bridge. Administrators should update affected applications and devices; the advisory lists no CVE ids or exploitation details.
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Three 10.0 security flaws fixed across Ubiquiti’s UniFi line
Ubiquiti patches 22 UniFi vulnerabilities, 21 rated critical including three CVSS 10.0 flaws enabling unauthorized access.
Ubiquiti disclosed and patched 22 vulnerabilities, 21 rated critical and three assigned the maximum CVSS 10.0 score: CVE-2026-77537, CVE-2026-77550, and CVE-2026-77554. All three involve improper access control that could let attackers gain privileges, while other flaws permit authentication bypass or arbitrary command execution. All but one of the 22 affect the UniFi product line. The company did not confirm whether any were exploited before patching.
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