CVE-2021-32781

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

1.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 70.6% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/I:N/A:H

NVD analysis status

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

Red Hat severity

Important. 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

2021-08-24 20:50Z5 YR AGO

Last updated

2024-08-03 23:33Z2 YR AGO

Reserved

2021-05-12

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.6)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant
• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

a828fd7f07aff835fd6c60ed264faf187fe6cbf371fb2c0d8e582537b329e94d

• www.envoyproxy.iohttps://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_historyx_refsource_MISC
• github.comhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-5vhv-gp9v-42qvx_refsource_CONFIRM