vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2023-23912

HIGH
8.8
CVSS Score
Published: February 9, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:38 AM UTC
22 products affected across 1 vendorEr X Sfp FirmwareEr X FirmwareEr 12 Firmware

Using Ubiquiti EdgeRouter(s) and USG(s) by N/A?

Get instant alerts when new vulnerabilities affect Ubiquiti EdgeRouter(s) and USG(s) - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.8
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

A vulnerability, found in EdgeRouters Version 2.0.9-hotfix.5 and earlier and UniFi Security Gateways (USG) Version 4.4.56 and earlier with their DHCPv6 prefix delegation set to dhcpv6-stateless or dhcpv6-stateful, allows a malicious actor directly connected to the WAN interface of an affected device to create a remote code execution vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Er 10X Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-10x (same device)
Er 12 Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-12 (same device)
Er 12P Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-12p (same device)
Er 4 Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-4 (same device)
Er 6P Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-6p (same device)
Er 8-xg Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-8-xg (same device)
Er X Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-x (same device)
Er X Sfp Firmware· UI
95%
v < 2.0.92.0.92.0.9 hotfix22.0.9 hotfix42.0.9 hotfix5
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
ui-er-x-sfp (same device)
Usg Firmware· UI
95%
v < 4.4.57
Affected range stops below 4.4.57, so it looks safe — our inference, not a vendor statement
ui-usg (same device)
Usg Pro 4 Firmware· UI
95%
v < 4.4.57
Affected range stops below 4.4.57, so it looks safe — our inference, not a vendor statement
ui-usg-pro-4 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

ExploitPatchVendor Advisory
Source: [email protected]
https://community.ui.com/releases/Security-Advisory-Bulletin-028-028/696e4e3b-718c-4da4-9a21-965a85633b5f

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-75CWE-94

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card