CVE-2020-5652
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series...
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
- Record
CVE-2020-5652- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List No score
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
- Record
CVE-2020-5652- Updated
- 2026-11-02
EUVDEUVD-2020-26813 No score
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
- Record
EUVD-2020-26813- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cpv9-4hm5-jjhj No score
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series...
Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .
- Record
GHSA-cpv9-4hm5-jjhj- Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
- mitsubishi electric corporation melsec iq-r, q and l series
- mitsubishielectric melsec iq-r00cpu firmware
- mitsubishielectric melsec iq-r01cpu firmware
- mitsubishielectric melsec iq-r02cpu firmware
- mitsubishielectric melsec iq-r04encpu firmware
- mitsubishielectric melsec iq-r08encpu firmware
- mitsubishielectric melsec iq-r08pcpu firmware
- mitsubishielectric melsec iq-r08psfcpu firmware
- mitsubishielectric melsec iq-r08sfcpu firmware
- mitsubishielectric melsec iq-r120encpu firmware
- mitsubishielectric melsec iq-r120pcpu firmware
- mitsubishielectric melsec iq-r120psfcpu firmware
Show 40 moreShow less
- mitsubishielectric melsec iq-r120sfcpu firmware
- mitsubishielectric melsec iq-r16encpu firmware
- mitsubishielectric melsec iq-r16mtcpu firmware
- mitsubishielectric melsec iq-r16pcpu firmware
- mitsubishielectric melsec iq-r16psfcpu firmware
- mitsubishielectric melsec iq-r16sfcpu firmware
- mitsubishielectric melsec iq-r32encpu firmware
- mitsubishielectric melsec iq-r32mtcpu firmware
- mitsubishielectric melsec iq-r32pcpu firmware
- mitsubishielectric melsec iq-r32psfcpu firmware
- mitsubishielectric melsec iq-r32sfcpu firmware
- mitsubishielectric melsec iq-r64mtcpu firmware
- mitsubishielectric melsec l02cpu-p firmware
- mitsubishielectric melsec l06cpu-p firmware
- mitsubishielectric melsec l26cpu-p firmware
- mitsubishielectric melsec l26cpu-pbt firmware
- mitsubishielectric melsec q-q03udecpu firmware
- mitsubishielectric melsec q-q03udvcpu firmware
- mitsubishielectric melsec q-q04udehcpu firmware
- mitsubishielectric melsec q-q04udpvcpu firmware
- mitsubishielectric melsec q-q04udvcpu firmware
- mitsubishielectric melsec q-q06udehcpu firmware
- mitsubishielectric melsec q-q06udpvcpu firmware
- mitsubishielectric melsec q-q100udehcpu firmware
- mitsubishielectric melsec q-q10udehcpu firmware
- mitsubishielectric melsec q-q13udehcpu firmware
- mitsubishielectric melsec q-q13udpvcpu firmware
- mitsubishielectric melsec q-q13udvcpu firmware
- mitsubishielectric melsec q-q170mcpu firmware
- mitsubishielectric melsec q-q170mscpu-s1 firmware
- mitsubishielectric melsec q-q172dcpu-s1 firmware
- mitsubishielectric melsec q-q172dscpu firmware
- mitsubishielectric melsec q-q173dcpu-s1 firmware
- mitsubishielectric melsec q-q173dscpu firmware
- mitsubishielectric melsec q-q20udehcpu firmware
- mitsubishielectric melsec q-q26udehcpu firmware
- mitsubishielectric melsec q-q26udpvcpu firmware
- mitsubishielectric melsec q-q26udvcpu firmware
- mitsubishielectric melsec q-q50udehcpu firmware
- mitsubishielectric melsec q-qmr-mq100 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-5652 is a high vulnerability (CVSS 7.5) in Mitsubishi Electric Corporation Melsec Iq-r, Q And L Series, published October 30, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.57%, the 89th percentile. No source names a fixed version.