CVE-2021-43394
CRITICALCVSS 9.8/10EPSS 1.17%
Last modified
CVE-2021-43394 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Unisys OS 2200 Messaging Integration Services (NTSI) 7R3B IC3 and IC4, 7R3C, and 7R3D has an Incorrect Implementation of an Authentication Algorithm. An LDAP password is not properly validated.. EPSS estimates a 1.17% chance of exploitation in the next 30 days.
Description
Unisys OS 2200 Messaging Integration Services (NTSI) 7R3B IC3 and IC4, 7R3C, and 7R3D has an Incorrect Implementation of an Authentication Algorithm. An LDAP password is not properly validated.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Unisys | Messaging Integration Services | 7r3b_ic3 |
| Unisys | Messaging Integration Services | 7r3b_ic4 |
| Unisys | Messaging Integration Services | 7r3c |
| Unisys | Messaging Integration Services | 7r3d |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43394?
Unisys OS 2200 Messaging Integration Services (NTSI) 7R3B IC3 and IC4, 7R3C, and 7R3D has an Incorrect Implementation of an Authentication Algorithm. An LDAP password is not properly validated.
How severe is CVE-2021-43394?
CVE-2021-43394 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.17% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43394?
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-2021-43394?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST