CVE-2020-12638

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

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 38.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2020-07-23 15:41Z6 YR AGO

Last updated

2024-08-04 12:04Z2 YR AGO

Reserved

2020-05-04

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-287Improper AuthenticationClass
• CWE-319Cleartext Transmission of Sensitive InformationBase

Data version

5.1

Document digest

8f53a8fe776ee3047e64abae7a8e669572b835c33c09e67a2baed791fc060572

• github.comhttps://github.com/espressif/esp-idfx_refsource_MISC
• github.comhttps://github.com/espressif/ESP8266_NONOS_SDKx_refsource_MISC
• github.comhttps://github.com/espressif/ESP8266_RTOS_SDKx_refsource_MISC
• lbsfilm.athttps://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessorsx_refsource_MISC