CVE-2021-40857

Name: CVE-2021-40857
Creator: NVD / NIST
Published: 2021-12-13T04:15:07.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.03%

Last modified Jun 17, 2026

CVE-2021-40857 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Auerswald COMpact 5500R devices before 8.2B allow Privilege Escalation via the passwd=1 substring.. EPSS estimates a 2.03% chance of exploitation in the next 30 days.

Description

Auerswald COMpact 5500R devices before 8.2B allow Privilege Escalation via the passwd=1 substring.

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

2.03%

78.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-522

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/165163/Auerswald-COMpact-8.0B-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.redteam-pentesting.de/advisories/rt-sa-2021-005Exploit, Third Party Advisory
https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysesExploit, Third Party Advisory
http://packetstormsecurity.com/files/165163/Auerswald-COMpact-8.0B-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://www.redteam-pentesting.de/advisories/rt-sa-2021-005Exploit, 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-2021-40857?

Auerswald COMpact 5500R devices before 8.2B allow Privilege Escalation via the passwd=1 substring.

How severe is CVE-2021-40857?

CVE-2021-40857 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.03% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40857?

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-2021-40857?

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

Scan your code now

Source: NVD / NIST