CVE-2021-40858

Name: CVE-2021-40858
Creator: NVD / NIST
Published: 2021-12-13T04:15:07.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 2.39%

Last modified Jun 17, 2026

CVE-2021-40858 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. Auerswald COMpact 5500R devices before 8.2B allow Arbitrary File Disclosure. A sub-admin can read the cleartext Admin password via the fileName=../../etc/passwd substring.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

Description

Auerswald COMpact 5500R devices before 8.2B allow Arbitrary File Disclosure. A sub-admin can read the cleartext Admin password via the fileName=../../etc/passwd substring.

Metrics

CVSS 3.1

4.9/10

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

EPSS Probability

2.39%

81.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Auerswald	Compact 5500r Ip Firmware	<= 8.0b
Auerswald	Compact 5200r Ip Firmware	<= 8.0b
Auerswald	Compact 5000r Ip Firmware	<= 8.0b
Auerswald	Compact 4000 Ip Firmware	<= 8.0b
Auerswald	Commander 6000r Ip Firmware	<= 8.0b
Auerswald	Commander 6000rx Ip Firmware	<= 8.0b
Auerswald	Commander Business\(19\"\) Ip Firmware	<= 8.0b
Auerswald	Commander Basic.2\(19\"\) Ip Firmware	<= 8.0b
Auerswald	Compact 5010 Voip Ip Firmware	<= 8.0b
Auerswald	Compact 5020 Voip Ip Firmware	<= 8.0b

References

http://packetstormsecurity.com/files/165166/Auerswald-COMpact-8.0B-Arbitrary-File-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
https://www.redteam-pentesting.de/advisories/rt-sa-2021-006Exploit, Third Party Advisory
https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysesExploit, Third Party Advisory
http://packetstormsecurity.com/files/165166/Auerswald-COMpact-8.0B-Arbitrary-File-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
https://www.redteam-pentesting.de/advisories/rt-sa-2021-006Exploit, Third Party Advisory
https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysesExploit, Third Party Advisory

Timeline

Published: Dec 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40858?

Auerswald COMpact 5500R devices before 8.2B allow Arbitrary File Disclosure. A sub-admin can read the cleartext Admin password via the fileName=../../etc/passwd substring.

How severe is CVE-2021-40858?

CVE-2021-40858 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40858?

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-2021-40858?

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

Scan your code now

Source: NVD / NIST