CVE-2021-24040

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

17.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 96.8% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/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

2021-09-10 22:10Z4 YR AGO

Last updated

2024-08-03 19:21Z2 YR AGO

Reserved

2021-01-13

Assigning CNA

facebook

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-502Deserialization of Untrusted DataBase

Data version

5.1

Document digest

b4c147439538841f5f48469a6618b372f7d7277a792addb4ba627f7b852e78d5

• github.comhttps://github.com/facebookresearch/ParlAI/releases/tag/v1.1.0x_refsource_MISC
• github.comhttps://github.com/facebookresearch/ParlAI/security/advisories/GHSA-m87f-9fvv-2mggx_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/164136/Facebook-ParlAI-1.0.0-Code-Execution-Deserialization.htmlx_refsource_MISC