CVE-2021-40524

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

4.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 90.2% 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 18:26Z5 YR AGO

Last updated

2025-11-04 00:12Z10 MO 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-434Unrestricted Upload of File with Dangerous TypeBase

Data version

5.2

Document digest

959e36a96d6c217847d9c23aef571a31cee61eb99c2289f77617ecb684e04ca8

• github.comhttps://github.com/jedisct1/pure-ftpd/pull/158x_refsource_MISC
• github.comhttps://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50x_refsource_CONFIRM
• github.comhttps://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4x_refsource_CONFIRM
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/11/msg00003.html