CVE-2023-1257

7.6 High

An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of the device and gain access to its BIOS. Command line options can then be altered, allowing the attacker to access the terminal. From the terminal, the attacker can modify the device’s authentication files to create a new user and gain full access to the system.

Attack profile

How easy it is to exploit

Attack vector: Physical
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.32%Up 0.3 points since Mar 8, 2023

What each source reports

CVE List Score used 7.6

CVE-2023-1257

Record: CVE-2023-1257
CVSS 3.1: 7.6 HighCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

EUVDEUVD-2023-23526 7.6

Record: EUVD-2023-23526
CVSS 3.1: 7.6 HighCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-whp2-gjjf-pvgr 6.8

An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of...

Record: GHSA-whp2-gjjf-pvgr
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-1263
Updated: 2026-11-02

NVD 7.6

Record: CVE-2023-1257
CVSS 3.1: 7.6 HighCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-1257 is a high vulnerability (CVSS 7.6) in Moxa Uc-2100 Series, published March 7, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. No source names a fixed version.