CVE-2021-32976
CRITICALCVSS 9.8/10EPSS 2.62%
Last modified
CVE-2021-32976 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.. EPSS estimates a 2.62% chance of exploitation in the next 30 days.
Description
Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.
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 |
|---|---|---|
| Moxa | Nport Iaw5150a-6i\/O Firmware | <= 2.2 |
| Moxa | Nport Iaw5150a-12i\/O Firmware | <= 2.2 |
| Moxa | Nport Iaw5250a-6i\/O Firmware | <= 2.2 |
| Moxa | Nport Iaw5250a-12i\/O Firmware | <= 2.2 |
References
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01Mitigation, Third Party Advisory, US Government Resource
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01Mitigation, Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-32976?
Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.
How severe is CVE-2021-32976?
CVE-2021-32976 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-32976?
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-2021-32976?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST