Ubiquiti Cloud Gateways crlf injection

Summaryinfo

A vulnerability was found in Ubiquiti Cloud Gateways, Cloud Keys, Dream Machines, Dream Routers, Dream Wall, Enterprise Firewall Core, Enterprise Fortress Gateway, Enterprise Network Attached Storage, Enterprise Network Video Recorders, Express, Express 7, Network Attached Storage, Network Video Recorders and UniFi OS Server. It has been classified as very critical. Affected is an unknown function. Performing a manipulation results in crlf injection. This vulnerability is reported as CVE-2026-77549. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as very critical has been found in Ubiquiti Cloud Gateways, Cloud Keys, Dream Machines, Dream Routers, Dream Wall, Enterprise Firewall Core, Enterprise Fortress Gateway, Enterprise Network Attached Storage, Enterprise Network Video Recorders, Express, Express 7, Network Attached Storage, Network Video Recorders and UniFi OS Server. This affects an unknown code block. The manipulation with an unknown input leads to a crlf injection vulnerability. CWE is classifying the issue as CWE-93. The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at community.ui.com. This vulnerability is uniquely identified as CVE-2026-77549 since 08/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/26/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-66398). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Network Attached Storage Software

Vendor

• Ubiquiti

Name

• Cloud Gateways
• Cloud Keys
• Dream Machines
• Dream Routers
• Dream Wall
• Enterprise Firewall Core
• Enterprise Fortress Gateway
• Enterprise Network Attached Storage
• Enterprise Network Video Recorders
• Express
• Express 7
• Network Attached Storage
• Network Video Recorders
• UniFi OS Server

License

• commercial

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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