CVE-2021-40903

Name: CVE-2021-40903
Creator: NVD / NIST
Published: 2022-06-17T14:15:08.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.40%

Last modified Jun 17, 2026

CVE-2021-40903 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.. EPSS estimates a 4.40% chance of exploitation in the next 30 days.

Description

A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.

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

4.40%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Antminer Monitor Project	Antminer Monitor	0.50.0

References

https://github.com/anselal/antminer-monitorProduct
https://packetstormsecurity.com/files/164048/Antminer-Monitor-0.5.0-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/50267Exploit, Third Party Advisory, VDB Entry
https://github.com/anselal/antminer-monitorProduct
https://packetstormsecurity.com/files/164048/Antminer-Monitor-0.5.0-Authentication-Bypass.htmlExploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/50267Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jun 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40903?

How severe is CVE-2021-40903?

CVE-2021-40903 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.40% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40903?

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-2021-40903?

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

Scan your code now

Source: NVD / NIST