CVE-2026-34911: Path Traversal in Ubiquiti Inc EFG

13

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.6% (30-day exploitation probability)+7
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.59%

ahead of 47% of scored CVEs · Oct 15, 2026

Affects

Ubiquiti Inc

EFG and 61 more

CVSS base

7.7

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

No

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — community.ui.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Ubiquiti Inc EFG, Ubiquiti Inc ENVR, Ubiquiti Inc ENVR-Core…).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (file handling), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Ubiquiti Inc	EFG	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	ENVR	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	ENVR-Core	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	Express 7	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCG-Fiber	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCG-Industrial	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCG-Max	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCG-Ultra	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCK	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCK-Enterprise	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UCKP	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDM	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDM-Beast	< 5.1.11	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDM-Pro	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDM-Pro-Max	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDM-SE	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDR	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDR-5G	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDR7	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UDW	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNAS-2	< 5.1.10	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNAS-4	< 5.1.10	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNAS-Pro	< 5.1.10	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNAS-Pro-4	< 5.1.10	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNAS-Pro-8	< 5.1.10	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UniFi OS Server	< 5.0.8	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNVR	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNVR-G2	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNVR-G2-Pro	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNVR-Instant	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ubiquiti Inc	UNVR-Pro	< 5.1.12	Vulnerable	CVE Program (cve.org) e CISA ADP
Ui	Enterprise Fortress Gateway Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Enterprise Network Video Recorder Core Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Enterprise Network Video Recorder Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unas 2 Firmware	< 5.1.10	Vulnerable	NIST National Vulnerability Database
Ui	Unas 4 Firmware	< 5.1.10	Vulnerable	NIST National Vulnerability Database
Ui	Unas Pro 4 Firmware	< 5.1.10	Vulnerable	NIST National Vulnerability Database
Ui	Unas Pro 8 Firmware	< 5.1.10	Vulnerable	NIST National Vulnerability Database
Ui	Unas Pro Firmware	< 5.1.10	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloud Gateway Fiber Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloud Gateway Industrial Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloud Gateway Max Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloud Gateway Ultra Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloud Key Plus Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloudkey Enterprise Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Cloudkey Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Machine Beast Firmware	< 5.1.11	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Machine Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Machine Pro Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Machine Pro Max Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Machine Special Edition Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Router 5g Max Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Router 7 Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Router Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Dream Wall Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Express 7 Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Network Video Recorder Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Network Video Recorder G2 Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Network Video Recorder G2 Pro Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Network Video Recorder Instant Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Network Video Recorder Pro Firmware	< 5.1.12	Vulnerable	NIST National Vulnerability Database
Ui	Unifi Os Server	< 5.0.8	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.7	CVSS 3.1	High	3.1	4.0	support@hackerone.com via NIST National Vulnerability Database
7.7	CVSS 3.1	High	—	—	hackerone via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N (score shown at the top: support@hackerone.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-22 · Path Traversal

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.59%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor file creation in web directories and paths with traversal sequences (../).

web/proxy/WAF logsnetwork IDS/IPSfile integrity (FIM)endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · ubiquiti inc/unifi os server, ubiquiti inc/udm, ubiquiti inc/udm-pro, ubiquiti inc/udm-se, ubiquiti inc/udm-pro-max, ubi
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Fix documented
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 7.7
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
May 21, 2026 · hackerone

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-c
Patch, Vendor Advisory, NIST National Vulnerability Database

Elsewhere on this site

Ubiquiti Inc
every CVE for this vendor

File handling
same class

CWE-22
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-55112 Improper Access Control in Ui Unifi Dream Machine Pro Firmware Jul 2, 2026
High CVE-2026-54404 SQL Injection in Ui Unifi Dream Machine Beast Firmware Jul 2, 2026
Medium CVE-2026-55110 Permissive Cross-domain Policy in Ui Unifi Os Server Jul 2, 2026
High CVE-2026-54401 Server-Side Request Forgery (SSRF) in Ui Unifi Os Server Jul 2, 2026
High CVE-2026-54402 Command Injection in Ui Unifi Os Server Jul 2, 2026
High CVE-2026-54403 Path Traversal in Ui Unifi Os Server Jul 2, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-34911 is "Path Traversal in Ubiquiti Inc EFG", rated High. It affects EFG (Ubiquiti Inc); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.7 describes technical severity. EPSS 0.59% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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