CVE-2021-40859
highpriority · attend · 74OT risk · highEPSS 0.720 · 99 %ileexploit · PoCEUUSEPSS · scored 2026-10-26
Backdoors were discovered in Auerswald COMpact 5500R 7.8A and 8.0B devices, that allow attackers with access to the web based management application full administrative access to the device.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9.8–10
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (3)
Public proof-of-concept and weaponised exploit code.
- EDB-50569Auerswald COMpact 8.0B - Multiple BackdoorsPoC · exploit_db
- 419066074/CVE-2021-40859Auerswald COMpact 8.0B Backdoors exploitPoC · poc_in_github
- pussycat0x/CVE-2021-40859Auerswald VoIP System Secret Backdoors -PoCPoC · poc_in_github
affected products (3)
Products and version ranges known to be affected.
- auerswald compact 5500r firmware= 7.8anvdUScpe:2.3:o:auerswald:compact_5500r_firmware:*:*:*:*:*:*:*:*
- auerswald compact 5500r firmware= 8.0bnvdUScpe:2.3:o:auerswald:compact_5500r_firmware:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-40859cnnvd
- https://packetstormsecurity.com/files/165168/Auerswald-COMpact-8.0B-Backdoors.htmlcnnvd
- https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysescnnvd
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoorscnnvd
- https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysesenisa_euvd
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoorsenisa_euvd
- https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analysesThird Party Advisorynvd
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoorsExploitThird Party Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan