CVE-2021-42951Network attack vector

Authenticated code execution via crafted Algorithm

Published Mar 1, 2022 · Updated Jul 9, 2026

Remote code execution in Algorithmia MSOL before October 10, 2021 allows remote authenticated users to run code through a crafted Algorithm. The service accepts a newly created Algorithm from an authenticated account and executes its supplied code, but the public record does not identify the validation or isolation failure that makes the execution unintended. A self-registered trial account and allocated credits are sufficient to reach the workflow; the resulting execution can read, alter, or interrupt resources available to its context.

CVSS severity8.8
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Algorithmia MSOL before October 10, 2021 allows remote authenticated users to run code through a crafted Algorithm. The service accepts a newly created Algorithm from an authenticated account and executes its supplied code, but the public record does not identify the validation or isolation failure that makes the execution unintended. A self-registered trial account and allocated credits are sufficient to reach the workflow; the resulting execution can read, alter, or interrupt resources available to its context.

The record

CVE
CVE-2021-42951
Published
Mar 1, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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