CVE-2021-31249

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

18.00% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 96.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-06-04 20:29Z5 YR AGO

Last updated

2024-08-03 22:55Z2 YR AGO

Reserved

2021-04-15

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class

Data version

5.1

Document digest

198a14174e096da183c5fc646856a1753fe138ceb25e6d379e25418c45e0ed2a

• seguranca-informatica.pthttps://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/x_refsource_MISC
• www.chiyu-tech.comhttps://www.chiyu-tech.com/msg/message-Firmware-update-87.htmlx_refsource_MISC
• gitbook.seguranca-informatica.pthttps://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31249x_refsource_MISC