CVE-2022-24946 [High] | Denial of Service in Q03udecpu Firmware

Improper Resource Locking vulnerability in Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V firmware versions "16" and prior, Mitsubishi Electric MELSEC-Q Series Q03UDECPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/10/13/20/26/50/100UDEHCPU the first 5 digits of serial No. "24061" and prior, Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q04/06/13/26UDPVCPU the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-Q Series Q12DCCPU-V all versions, Mitsubishi Electric MELSEC-Q Series Q24DHCCPU-V(G) all versions, Mitsubishi Electric MELSEC-Q Series Q24/26DHCCPU-LS all versions, Mitsubishi Electric MELSEC-L series L02/06/26CPU(-P) the first 5 digits of serial number "24051" and prior, Mitsubishi Electric MELSEC-L series L26CPU-(P)BT the first 5 digits of serial number "24051" and prior and Mitsubishi Electric MELIPC Series MI5122-VW firmware versions "05" and prior allows a remote unauthenticated attacker to cause a denial of service (DoS) condition in Ethernet communications by sending specially crafted packets. A system reset of the products is required for recovery.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.44%	1.54%	+1.10%
2	2025-11-21	0.61%	0.44%	-0.17%
3	2025-11-18	—	0.61%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.44%

1.54%

+1.10%

2025-11-21

0.61%

0.44%

-0.17%

2025-11-18

—

0.61%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	134c704f-9b21-4f2e-91b3-4a467353bcc0
7.8	2.0	HIGH	`AV:N/AC:L/Au:N/C:N/I:N/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:C) Complete availability impact.	10.0	6.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

134c704f-9b21-4f2e-91b3-4a467353bcc0

7.8

2.0

HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:C): Complete availability impact.

10.0

6.9

[email protected]

Affected software / configurations for CVE-2022-24946

Vendor	Product	Version	Raw CPE
mitsubishielectric	q03udecpu_firmware	—	cpe:2.3:o:mitsubishielectric:q03udecpu_firmware:-:::::::*
mitsubishielectric	q04udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q04udehcpu_firmware:-:::::::*
mitsubishielectric	q04udpvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q04udpvcpu_firmware:-:::::::*
mitsubishielectric	q04udvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q04udvcpu_firmware:-:::::::*
mitsubishielectric	q100udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q100udehcpu_firmware:-:::::::*
mitsubishielectric	q50udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q50udehcpu_firmware:-:::::::*
mitsubishielectric	q26dhccpu-ls_firmware	—	cpe:2.3:o:mitsubishielectric:q26dhccpu-ls_firmware:-:::::::*
mitsubishielectric	q26udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q26udehcpu_firmware:-:::::::*
mitsubishielectric	q26udpvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q26udpvcpu_firmware:-:::::::*
mitsubishielectric	q26udvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q26udvcpu_firmware:-:::::::*
mitsubishielectric	q20udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q20udehcpu_firmware:-:::::::*
mitsubishielectric	q13udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q13udehcpu_firmware:-:::::::*
mitsubishielectric	q13udpvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q13udpvcpu_firmware:-:::::::*
mitsubishielectric	q13udvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q13udvcpu_firmware:-:::::::*
mitsubishielectric	q10udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q10udehcpu_firmware:-:::::::*
mitsubishielectric	q06ccpu-v_firmware	—	cpe:2.3:o:mitsubishielectric:q06ccpu-v_firmware:-:::::::*
mitsubishielectric	q06phcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q06phcpu_firmware:-:::::::*
mitsubishielectric	q06udehcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q06udehcpu_firmware:-:::::::*
mitsubishielectric	q06udpvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q06udpvcpu_firmware:-:::::::*
mitsubishielectric	q06udvcpu_firmware	—	cpe:2.3:o:mitsubishielectric:q06udvcpu_firmware:-:::::::*
mitsubishielectric	l02cpu_firmware	—	cpe:2.3:o:mitsubishielectric:l02cpu_firmware:-:::::::*
mitsubishielectric	l02cpu-p_firmware	—	cpe:2.3:o:mitsubishielectric:l02cpu-p_firmware:-:::::::*
mitsubishielectric	l02scpu_firmware	—	cpe:2.3:o:mitsubishielectric:l02scpu_firmware:-:::::::*
mitsubishielectric	l02scpu-p_firmware	—	cpe:2.3:o:mitsubishielectric:l02scpu-p_firmware:-:::::::*
mitsubishielectric	l06cpu_firmware	—	cpe:2.3:o:mitsubishielectric:l06cpu_firmware:-:::::::*
mitsubishielectric	l06cpu-p_firmware	—	cpe:2.3:o:mitsubishielectric:l06cpu-p_firmware:-:::::::*
mitsubishielectric	l26cpu_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu_firmware:-:::::::*
mitsubishielectric	l26cpu-\(p\)bt_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu-\(p\)bt_firmware:-:::::::*
mitsubishielectric	l26cpu-bt_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu-bt_firmware:-:::::::*
mitsubishielectric	l26cpu-bt-cm_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu-bt-cm_firmware:-:::::::*
mitsubishielectric	l26cpu-p_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu-p_firmware:-:::::::*
mitsubishielectric	l26cpu-pbt_firmware	—	cpe:2.3:o:mitsubishielectric:l26cpu-pbt_firmware:-:::::::*

References for CVE-2022-24946

URL	Tags
https://jvn.jp/vu/JVNVU90895626/index.html	Third Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-22-172-01
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-007_en.pdf	Vendor Advisory

URL

CVE-2022-24946

Exploit prediction scoring system (EPSS) score for CVE-2022-24946

Common vulnerability scoring system (CVSS) metrics for CVE-2022-24946

Weakness enumeration for CVE-2022-24946

GitHub Security Advisory for CVE-2022-24946

Affected software / configurations for CVE-2022-24946

References for CVE-2022-24946