Cyber Resilience

CVE-2023-23912

HighPublic PoC

Published: 09 February 2023

Published
09 February 2023
Modified
24 March 2025
KEV Added
Patch
CVSS Score v3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0132 80.3th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-23912 is a high-severity Special Element Injection (CWE-75) vulnerability in Ui Er-10X Firmware. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 19.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

affected device to create a remote code execution vulnerability.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

ui
usg firmware
≤ 4.4.57
ui
usg-pro-4 firmware
≤ 4.4.57
ui
er-10x firmware
2.0.9 · ≤ 2.0.9
ui
er-12 firmware
2.0.9 · ≤ 2.0.9
ui
er-12p firmware
2.0.9 · ≤ 2.0.9
ui
er-4 firmware
2.0.9 · ≤ 2.0.9
ui
er-6p firmware
2.0.9 · ≤ 2.0.9
ui
er-8-xg firmware
2.0.9 · ≤ 2.0.9
ui
er-x firmware
2.0.9 · ≤ 2.0.9
ui
er-x-sfp firmware
2.0.9 · ≤ 2.0.9

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-94

Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.

addresses: CWE-94

Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.

addresses: CWE-94

Validates inputs used in dynamic code generation to block injected directives.

addresses: CWE-94

Directly prevents execution of attacker-supplied code written into data memory regions.

References