No exploitation reportedFix available

CVE-2020-13238

No exploitation reported by the sources we read.

Published2020-06-10
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Mitsubishi MELSEC iQ-R Series PLCs with firmware 33 allow attackers to halt the industrial process by sending an unauthenticated crafted packet over the network, because this denial of service attack consumes excessive CPU time. After halting, physical access to the PLC is required in order to restore production.

Timeline

dates in UTC

2020-06-1020:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-13238?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-13238?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Mitsubishielectric melsec iq-r00cpu firmwareversion to verify

Branch	Affected	Fixed in	Source
7.x	≤ 7	no fix published	NVD

Mitsubishielectric melsec iq-r01cpu firmwareversion to verify

Branch	Affected	Fixed in	Source
7.x	≤ 7	no fix published	NVD

Mitsubishielectric melsec iq-r02cpu firmwareversion to verify

Branch	Affected	Fixed in	Source
7.x	≤ 7	no fix published	NVD

18 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-20-161-02 CISA6 known affected
Mitsubishi Electric MELSEC iQ-R Series (Update C)
RJ71EN71: Firmwar Versions 49 or earlier · R08/16/32/120SFCPU: Firmware Versions 20 or earlier · R08/16/32/120PSFCPU: Firmware Versions 05 or earlier · +3 more

Full record on NVD

Fix

Vendor fix CISA ICSA-20-161-02 · 6 productsR00/01/02CPU: Firmware Versions 8 or later
Mitigation from the vendor CISA ICSA-20-161-02 · 6 productsR04/08/16/32/120CPU, R04/08/16/32/120ENCPU: Firmware Versions 40 or later
Mitigation from the vendor CISA ICSA-20-161-02 · 6 productsR08/16/32/120SFCPU: Firmware Versions 21 or later
Mitigation from the vendor CISA ICSA-20-161-02 · 6 productsR08/16/32/120PCPU: Firmware Versions 25 or later
Mitigation from the vendor CISA ICSA-20-161-02 · 6 productsR08/16/32/120PSFCPU: Firmware Versions 06 or later
Mitigation from the vendor CISA ICSA-20-161-02 · 6 productsRJ71EN71: Firmware Versions 50 or later

Advisories and patches

www.mitsubishielectric.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score3.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-06-10
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-13238?

Is CVE-2020-13238 actively exploited?

Active exploitation of CVE-2020-13238 has not been confirmed. Its EPSS score was 3.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-13238?

CVE-2020-13238 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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