Moxa NPort IAW5000A-I/O Series Serial Device Server Classic Buffer Overflow
Priority MEDIUM 42CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Two 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 cause a denial-of-service condition.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01703 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Moxa | NPort IAW5000A-I/O Series firmware | up to 2.2 | — | No fix listed | CNA |
- NPort IAW5000A-I/O Series firmware VendorMoxa Affected up to 2.2 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:moxa:nport_iaw5150a-6i\/o_firmware:*:*:*:*:*:*:*:* | up to 2.2 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:nport_iaw5150a-6i\/o:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:nport_iaw5150a-12i\/o_firmware:*:*:*:*:*:*:*:* | up to 2.2 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:nport_iaw5150a-12i\/o:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:nport_iaw5250a-6i\/o_firmware:*:*:*:*:*:*:*:* | up to 2.2 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:nport_iaw5250a-6i\/o:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
| cpe:2.3:o:moxa:nport_iaw5250a-12i\/o_firmware:*:*:*:*:*:*:*:* | up to 2.2 | Vulnerable | Moxa |
| cpe:2.3:h:moxa:nport_iaw5250a-12i\/o:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Moxa |
- cpe:2.3:o:moxa:nport_iaw5150a-6i\/o_firmware:*:*:*:*:*:*:*:* Versions up to 2.2 Vulnerable ·Moxa
- cpe:2.3:h:moxa:nport_iaw5150a-6i\/o:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:nport_iaw5150a-12i\/o_firmware:*:*:*:*:*:*:*:* Versions up to 2.2 Vulnerable ·Moxa
- cpe:2.3:h:moxa:nport_iaw5150a-12i\/o:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:nport_iaw5250a-6i\/o_firmware:*:*:*:*:*:*:*:* Versions up to 2.2 Vulnerable ·Moxa
- cpe:2.3:h:moxa:nport_iaw5250a-6i\/o:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
- cpe:2.3:o:moxa:nport_iaw5250a-12i\/o_firmware:*:*:*:*:*:*:*:* Versions up to 2.2 Vulnerable ·Moxa
- cpe:2.3:h:moxa:nport_iaw5250a-12i\/o:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Moxa
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-32968
- 2026-10-03 Alias added: GHSA-hmp7-5xvh-34hr
References
More Moxa Nport Iaw5150a-12i/o Firmware vulnerabilities
- TI-2021-12584 Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-based Buffer Overflow CVSS 3.1CRITICAL 9.8
- TI-2021-12582 Moxa NPort IAW5000A-I/O Series Serial Device Server Improper Input Validation CVSS 3.1CRITICAL 9.8
- TI-2021-12579 Moxa NPort IAW5000A-I/O Series Serial Device Server Improper Input Validation CVSS 3.1HIGH 7.5
Sources
- CVE-2021-32968 · CVE Program
- CVE-2021-32968 · NVD
- FIRST EPSS
- GHSA-hmp7-5xvh-34hr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences