CVE-2021-44207 Acclaim Systems USAHERDS Use of Hard-Coded Credentials Vulnerability
Acclaim Systems USAHERDS contains a hard-coded credentials vulnerability that could allow an attacker to achieve remote code execution on the system that runs the application. The MachineKey must be obtained via a separate vulnerability or other channel.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 23 Dec 2024.
- Rated High severity (CVSS 8.1, scored by CISA).
- It has been in the catalogue for 683 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
Acclaim USAHERDS through 7.4.0.1 uses hard-coded credentials.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for Acclaim Systems USAHERDS. Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
Fix it
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Please contact the product developer for support and vulnerability mitigation.
Vulnerability Management - 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
More Exploited Acclaim Systems Flaws
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