CVE-2026-77549 json
A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulner…
published 2026-08-26 2 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-66398
- cvss
- 9.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulnerability found in certain devices running UniFi OS to bypass authentication to such UniFi OS devices or instances.
Patch / fix
- Ubiquiti Inc UniFi OS Server 5.1.37
- Ubiquiti Inc Cloud Keys 5.1.31
- Ubiquiti Inc Network Video Recorders 5.1.31
- Ubiquiti Inc Enterprise Network Video Recorders 5.1.31
- Ubiquiti Inc Enterprise Network Attached Storage 5.1.31
- Ubiquiti Inc Dream Machines 5.1.31
- Ubiquiti Inc Enterprise Firewall Core 5.1.31
- Ubiquiti Inc Dream Routers 5.1.31
- Ubiquiti Inc Enterprise Fortress Gateway 5.1.31
- Ubiquiti Inc Cloud Gateways 5.1.31
- Ubiquiti Inc Dream Wall 5.1.31
- Ubiquiti Inc Express 7 5.1.31
- Ubiquiti Inc Network Attached Storage 5.1.32
- Ubiquiti Inc Express 4.0.17
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
- Ubiquiti Inc UniFi OS Server
- Ubiquiti Inc Cloud Keys
- Ubiquiti Inc Network Video Recorders
- Ubiquiti Inc Enterprise Network Video Recorders
- Ubiquiti Inc Enterprise Network Attached Storage
- Ubiquiti Inc Dream Machines
- Ubiquiti Inc Enterprise Firewall Core
- Ubiquiti Inc Dream Routers
- Ubiquiti Inc Enterprise Fortress Gateway
- Ubiquiti Inc Cloud Gateways
- Ubiquiti Inc Dream Wall
- Ubiquiti Inc Express 7
- Ubiquiti Inc Network Attached Storage
- Ubiquiti Inc Express
Classification
- Weakness
-
- CWE-93 Improper Neutralization of CRLF Sequences
References
Sources
- CVE List CVE-2026-77549
- NVD CVE-2026-77549
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