CVE-2021-40859
CRITICALCVSS 9.8/10EPSS 71.98%
Last modified
CVE-2021-40859 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 71.98% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Auerswald | Compact 5500r Firmware | 7.8a | Build002 |
| Auerswald | Compact 5500r Firmware | 8.0b | Build000 |
References
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoorsExploit, Third Party Advisory
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-007/-auerswald-compact-multiple-backdoorsExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-40859?
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.
How severe is CVE-2021-40859?
CVE-2021-40859 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 71.98% probability of exploitation in the next 30 days.
How do I fix CVE-2021-40859?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-40859?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST