CVE-2021-45420

Name: CVE-2021-45420
Creator: NVD / NIST
Published: 2022-02-14T14:15:08.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 25.96%

Last modified Jun 17, 2026

CVE-2021-45420 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Emerson Dixell XWEB-500 products are affected by arbitrary file write vulnerability in /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi. An attacker will be able to write any file on the target system without any kind of authentication mechanism, and this can lead to denial of service and potentially remote code execution. EPSS estimates a 25.96% chance of exploitation in the next 30 days.

Description

Emerson Dixell XWEB-500 products are affected by arbitrary file write vulnerability in /cgi-bin/logo_extra_upload.cgi, /cgi-bin/cal_save.cgi, and /cgi-bin/lo_utils.cgi. An attacker will be able to write any file on the target system without any kind of authentication mechanism, and this can lead to denial of service and potentially remote code execution. Note: the product has not been supported since 2018 and should be removed or replaced

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

25.96%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Emerson	Dixell Xweb-500 Firmware	All versions

References

http://dixell.comProduct
http://emerson.comVendor Advisory
https://www.swascan.com/emersonExploit, Third Party Advisory
http://dixell.comProduct
http://emerson.comVendor Advisory
https://www.swascan.com/emersonExploit, Third Party Advisory

Timeline

Published: Feb 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45420?

How severe is CVE-2021-45420?

CVE-2021-45420 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 25.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45420?

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-2021-45420?

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

Scan your code now

Source: NVD / NIST