What is CVE-2021-40865?

CVE-2021-40865 is a critical-severity vulnerability in Apache Storm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-10-25.

How severe is CVE-2021-40865?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-40865 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Apache Storm

CVE-2021-40865

An Unsafe Deserialization vulnerability exists in the worker services of the Apache Storm supervisor server allowing pre-auth Remote Code Execution (RCE). Apache Storm 2.2.x users should upgrade to version 2.2.1 or 2.3.0. Apache Storm 2.1…

Vulnerability class: Insecure Deserialization

EPSS: 0.656 (99.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Storm
Apache Software Foundation Storm — versions v1.0.0, Apache Storm

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
security@apache.org (Mailing List, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-40865?: CVE-2021-40865 is a critical-severity vulnerability in Apache Storm, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-10-25.
How severe is CVE-2021-40865?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-40865 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.