CVE-2021-38294

Name: CVE-2021-38294
Creator: NVD / NIST
Published: 2021-10-25T13:15:07.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 84.49%

Last modified Jun 17, 2026

CVE-2021-38294 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.. EPSS estimates a 84.49% chance of exploitation in the next 30 days.

Description

A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

84.49%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Storm	>= 1.0.0, < 1.2.4
Apache	Storm	>= 2.1.0, < 2.1.1
Apache	Storm	>= 2.2.0, < 2.2.1

References

http://packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.2.0-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d35115af49f43beea7a8b0915e377859%40%3Cuser.storm.apache.org%3EMailing List, Vendor Advisory
https://seclists.org/oss-sec/2021/q4/44Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.2.0-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d35115af49f43beea7a8b0915e377859%40%3Cuser.storm.apache.org%3EMailing List, Vendor Advisory
https://seclists.org/oss-sec/2021/q4/44Mailing List, Third Party Advisory

Timeline

Published: Oct 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38294?

How severe is CVE-2021-38294?

CVE-2021-38294 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 84.49% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38294?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38294?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST