CVE-2021-39218

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

0.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 22.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-09-17 20:10Z4 YR AGO

Last updated

2024-08-04 01:58Z2 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-590Free of Memory not on the HeapVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

164a1cabb8eabb7f27656f776f6ba97b7b2a9ecc8fdd06aa34e1adfb6ceba798

• crates.iohttps://crates.io/crates/wasmtimex_refsource_MISC
• github.comhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4873-36h9-wv49x_refsource_CONFIRM
• github.comhttps://github.com/bytecodealliance/wasmtime/commit/398a73f0dd862dbe703212ebae8e34036a18c11cx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-68713440cbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2Z33FTXFQ6EOINVEQIP4DFBG53G5XIY/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-1805eacb48https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAVBRYDDUIY2ZR3K3FO4BVYJKIMJ5TP7/vendor-advisoryx_refsource_FEDORA