CVE-2020-26143

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

4.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 90.0% 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:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD analysis status

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

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-05-11 19:36Z5 YR AGO

Last updated

2026-04-14 08:49Z4 MO AGO

Reserved

2020-09-29

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-346Origin Validation ErrorClass

Data version

5.2

Document digest

4d3c98109146a2ec0c7fa760124d9bf7981c32a0e40ec546e496cf77bfb4239e

• tools.cisco.com20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWuvendor-advisoryx_refsource_CISCO
• www.fragattacks.comhttps://www.fragattacks.comx_refsource_MISC
• github.comhttps://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdx_refsource_MISC
• www.openwall.com[oss-security] 20210511 various 802.11 security issues - fragattacks.comhttp://www.openwall.com/lists/oss-security/2021/05/11/12mailing-listx_refsource_MLIST
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfx_refsource_CONFIRM
• www.arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63x_refsource_MISC
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-913875.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019200.html