CVE-2021-36977

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

1.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 72.6% 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:R/S:U/C:N/I:N/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

2021-07-20 06:48Z5 YR AGO

Last updated

2024-08-04 01:09Z2 YR AGO

Reserved

2021-07-20

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

6e21ac971709a037871d894dabb049328687a718645b2e72b055779163929d24

• github.comhttps://github.com/google/oss-fuzz-vulns/blob/main/vulns/matio/OSV-2021-440.yamlx_refsource_MISC
• bugs.chromium.orghttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31265x_refsource_MISC
• github.comhttps://github.com/google/oss-fuzz-vulns/commit/37b781ace1b4228fc36483bb7e30c72ea9d4c3d6x_refsource_MISC
• github.comhttps://github.com/HDFGroup/hdf5/issues/272x_refsource_MISC
• github.comhttps://github.com/google/oss-fuzz/issues/4999x_refsource_MISC