CVE-2021-40516

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

1.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 73.5% 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

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

2021-09-05 17:14Z5 YR AGO

Last updated

2024-08-04 02:44Z2 YR AGO

Reserved

2021-09-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.1

Document digest

9645c9b01185a27c38588285826c2a53e61b1b5be674e7e62f8d3ae34182a0f6

• weechat.orghttps://weechat.org/doc/security/x_refsource_MISC
• github.comhttps://github.com/weechat/weechat/commit/8b1331f98de1714bae15a9ca2e2b393ba49d735bx_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210930 [SECURITY] [DLA 2770-1] weechat security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00018.htmlmailing-listx_refsource_MLIST