CVE-2021-40845

Name: CVE-2021-40845
Creator: NVD / NIST
Published: 2021-09-15T13:15:08.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.61%

Last modified Jun 17, 2026

CVE-2021-40845 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The web part of Zenitel AlphaCom XE Audio Server through 11.2.3.10, called AlphaWeb XE, does not restrict file upload in the Custom Scripts section at php/index.php. Neither the content nor extension of the uploaded files is checked, allowing execution of PHP code under the /cmd directory.. EPSS estimates a 4.61% chance of exploitation in the next 30 days.

Description

The web part of Zenitel AlphaCom XE Audio Server through 11.2.3.10, called AlphaWeb XE, does not restrict file upload in the Custom Scripts section at php/index.php. Neither the content nor extension of the uploaded files is checked, allowing execution of PHP code under the /cmd directory.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

4.61%

90.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Zenitel	Alphacom Xe Audio Server	<= 11.2.3.10

References

http://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/ricardojoserf/CVE-2021-40845Exploit, Third Party Advisory
https://ricardojoserf.github.io/CVE-2021-40845/Exploit, Third Party Advisory
http://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/ricardojoserf/CVE-2021-40845Exploit, Third Party Advisory
https://ricardojoserf.github.io/CVE-2021-40845/Exploit, Third Party Advisory

Timeline

Published: Sep 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40845?

How severe is CVE-2021-40845?

CVE-2021-40845 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40845?

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-2021-40845?

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

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Source: NVD / NIST