CVE-2021-20607

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 61.9% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-12-17 16:10Z4 YR AGO

Last updated

2024-08-03 17:45Z2 YR AGO

Reserved

2020-12-17

Assigning CNA

Mitsubishi

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-191Integer Underflow (Wrap or Wraparound)Base

Data version

5.1

Document digest

1e6574e9587a411634b97ceef6ce5e354da6d2c8f4ecdd4b3c5650f3e38647ca

• www.mitsubishielectric.comhttps://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-021_en.pdfx_refsource_MISC
• jvn.jphttps://jvn.jp/vu/JVNVU93817405/index.htmlx_refsource_MISC
• us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-350-05x_refsource_MISC