What’s Vulnerable › Vulnerabilities

CVE-2021-40859

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 72.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-07 · updated 2026-06-17

Description

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.

Affected products

• Auerswald Compact 5500R Firmware: 7.8a-build002, 8.0b-build000

References

• https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses
• https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoors
• https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses
• https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoors

Get alerted when CVE-2021-40859 or the next vulnerability affects your stack