CVE-2026-0715 [High] | Privilege Escalation in Uc-1222a Firmware

Moxa Arm-based industrial computers running Moxa Industrial Linux Secure use a device-unique bootloader password provided on the device. An attacker with physical access to the device could use this information to access the bootloader menu via a serial interface. Access to the bootloader menu does not allow full system takeover or privilege escalation. The bootloader enforces digital signature verification and only permits flashing of Moxa-signed images. As a result, an attacker cannot install malicious firmware or execute arbitrary code. The primary impact is limited to a potential temporary denial-of-service condition if a valid image is reflashed. Remote exploitation is not possible.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.22%	+0.20%
2	2026-02-06	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.02%

0.22%

+0.20%

2026-02-06

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.0	4.0	HIGH	`CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X` Click to expand Attack vector (AV:P) Physical access is required. Attack complexity (AC:L) Exploitation conditions are straightforward and stable. Attack requirements (AT:N) No additional preconditions are required beyond normal reachability. Privileges required (PR:N) No privileges are required. User interaction (UI:N) No user interaction is required. Vulnerable system confidentiality impact (VC:H) High confidentiality impact on the vulnerable system. Vulnerable system integrity impact (VI:H) High integrity impact on the vulnerable system. Vulnerable system availability impact (VA:H) High availability impact on the vulnerable system. Subsequent system confidentiality impact (SC:N) No confidentiality impact on subsequent systems. Subsequent system integrity impact (SI:N) No integrity impact on subsequent systems. Subsequent system availability impact (SA:N) No availability impact on subsequent systems. Exploit maturity (threat) (E:X) Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked). Confidentiality requirement (CR:X) Not defined: insufficient information; scoring treats this like High (worst case). Integrity requirement (IR:X) Not defined: insufficient information; scoring treats this like High (worst case). Availability requirement (AR:X) Not defined: insufficient information; scoring treats this like High (worst case). Modified attack vector (MAV:X) Not defined: scoring uses the Base Attack Vector (AV). Modified attack complexity (MAC:X) Not defined: scoring uses the Base Attack Complexity (AC). Modified attack requirements (MAT:X) Not defined: scoring uses the Base Attack Requirements (AT). Modified privileges required (MPR:X) Not defined: scoring uses the Base Privileges Required (PR). Modified user interaction (MUI:X) Not defined: scoring uses the Base User Interaction (UI). Modified vulnerable system confidentiality impact (MVC:X) Not defined: scoring uses the Base VC metric. Modified vulnerable system integrity impact (MVI:X) Not defined: scoring uses the Base VI metric. Modified vulnerable system availability impact (MVA:X) Not defined: scoring uses the Base VA metric. Modified subsequent system confidentiality impact (MSC:X) Not defined: scoring uses the Base SC metric. Modified subsequent system integrity impact (MSI:X) Not defined: scoring uses the Base SI metric. Modified subsequent system availability impact (MSA:X) Not defined: scoring uses the Base SA metric. Safety (supplemental) (S:X) Not evaluated. Automatable (supplemental) (AU:X) Not evaluated. Recovery (supplemental) (R:X) Not evaluated. Value density (supplemental) (V:X) Not evaluated. Vulnerability response effort (supplemental) (RE:X) Not evaluated. Provider urgency (supplemental) (U:X) Not evaluated.	—	—	[email protected]
6.8	3.1	MEDIUM	`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:P) Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	0.9	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.0

4.0

HIGH

CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Click to expand

Attack vector (AV:P): Physical access is required.
Attack complexity (AC:L): Exploitation conditions are straightforward and stable.
Attack requirements (AT:N): No additional preconditions are required beyond normal reachability.
Privileges required (PR:N): No privileges are required.
User interaction (UI:N): No user interaction is required.
Vulnerable system confidentiality impact (VC:H): High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H): High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H): High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N): No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N): No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N): No availability impact on subsequent systems.
Exploit maturity (threat) (E:X): Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X): Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X): Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X): Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X): Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X): Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X): Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X): Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X): Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X): Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X): Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X): Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X): Not evaluated.
Automatable (supplemental) (AU:X): Not evaluated.
Recovery (supplemental) (R:X): Not evaluated.
Value density (supplemental) (V:X): Not evaluated.
Vulnerability response effort (supplemental) (RE:X): Not evaluated.
Provider urgency (supplemental) (U:X): Not evaluated.

—

[email protected]

6.8

3.1

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:P): Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

0.9

5.9

[email protected]

Affected software / configurations for CVE-2026-0715

Vendor	Product	Version	Raw CPE
moxa	uc-1222a_firmware	<= 1.4	cpe:2.3:o:moxa:uc-1222a_firmware::::::::
moxa	uc-2222a-t-us_firmware	<= 1.4	cpe:2.3:o:moxa:uc-2222a-t-us_firmware::::::::
moxa	uc-2222a-t_firmware	<= 1.4	cpe:2.3:o:moxa:uc-2222a-t_firmware::::::::
moxa	uc-2222a-t-ap_firmware	<= 1.4	cpe:2.3:o:moxa:uc-2222a-t-ap_firmware::::::::
moxa	uc-2222a-t-eu_firmware	<= 1.4	cpe:2.3:o:moxa:uc-2222a-t-eu_firmware::::::::
moxa	uc-3434a-t-lte-wifi_firmware	<= 1.2	cpe:2.3:o:moxa:uc-3434a-t-lte-wifi_firmware::::::::
moxa	uc-3424a-t-lte_firmware	<= 1.2	cpe:2.3:o:moxa:uc-3424a-t-lte_firmware::::::::
moxa	uc-3420a-t-lte_firmware	<= 1.2	cpe:2.3:o:moxa:uc-3420a-t-lte_firmware::::::::
moxa	uc-3430a-t-lte-wifi_firmware	<= 1.2	cpe:2.3:o:moxa:uc-3430a-t-lte-wifi_firmware::::::::
moxa	uc-4450a-t-5g_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4450a-t-5g_firmware::::::::
moxa	uc-4434a-i-t_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4434a-i-t_firmware::::::::
moxa	uc-4410a-t_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4410a-t_firmware::::::::
moxa	uc-4454a-t-5g_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4454a-t-5g_firmware::::::::
moxa	uc-4414a-i-t_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4414a-i-t_firmware::::::::
moxa	uc-4430a-t_firmware	<= 1.3	cpe:2.3:o:moxa:uc-4430a-t_firmware::::::::
moxa	uc-8210-t-lx-s_firmware	<= 1.5	cpe:2.3:o:moxa:uc-8210-t-lx-s_firmware::::::::
moxa	uc-8220-t-lx-eu-s_firmware	<= 1.5	cpe:2.3:o:moxa:uc-8220-t-lx-eu-s_firmware::::::::
moxa	uc-8220-t-lx-ap-s_firmware	<= 1.5	cpe:2.3:o:moxa:uc-8220-t-lx-ap-s_firmware::::::::
moxa	uc-8220-t-lx-us-s_firmware	<= 1.5	cpe:2.3:o:moxa:uc-8220-t-lx-us-s_firmware::::::::
moxa	uc-8220-t-lx_firmware	<= 1.5	cpe:2.3:o:moxa:uc-8220-t-lx_firmware::::::::
moxa	v1202-ct-t_firmware	<= 1.2.0	cpe:2.3:o:moxa:v1202-ct-t_firmware::::::::
moxa	v1222-ct-t_firmware	<= 1.2.0	cpe:2.3:o:moxa:v1222-ct-t_firmware::::::::
moxa	v1222-w-ct-t_firmware	<= 1.2.0	cpe:2.3:o:moxa:v1222-w-ct-t_firmware::::::::
moxa	v2406c-kl7-ct-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl7-ct-t_firmware::::::::
moxa	v2406c-kl7-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl7-t_firmware::::::::
moxa	v2406c-wl7-ct-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl7-ct-t_firmware::::::::
moxa	v2406c-wl5-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl5-t_firmware::::::::
moxa	v2406c-kl1-ct-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl1-ct-t_firmware::::::::
moxa	v2406c-wl3-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl3-t_firmware::::::::
moxa	v2406c-wl1-ct-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl1-ct-t_firmware::::::::
moxa	v2406c-kl3-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl3-t_firmware::::::::
moxa	v2406c-wl1-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl1-t_firmware::::::::
moxa	v2406c-kl1-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl1-t_firmware::::::::
moxa	v2406c-wl7-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-wl7-t_firmware::::::::
moxa	v2406c-kl5-t_firmware	<= 1.2	cpe:2.3:o:moxa:v2406c-kl5-t_firmware::::::::

References for CVE-2026-0715

URL	Tags
https://www.moxa.com/en/support/product-support/security-advisory/mpsa-255121-cve-2026-0714-cve-2026-0715-multiple-vulnerabilities-in-industrial-computers	Vendor Advisory

URL

CVE-2026-0715

Exploit prediction scoring system (EPSS) score for CVE-2026-0715

Common vulnerability scoring system (CVSS) metrics for CVE-2026-0715

Weakness enumeration for CVE-2026-0715

Affected software / configurations for CVE-2026-0715

References for CVE-2026-0715