What’s Vulnerable › Vulnerabilities

CVE-2021-32968: Moxa NPort IAW5000A-I/O Series Serial Device Server Classic Buffer Overflow

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-01 · updated 2026-06-17
• Weakness: CWE-120

Description

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.

Affected products

• Moxa Nport Iaw5150A-12I/O Firmware: through 2.2
• Moxa Nport Iaw5150A-6I/O Firmware: through 2.2
• Moxa Nport Iaw5250A-12I/O Firmware: through 2.2
• Moxa Nport Iaw5250A-6I/O Firmware: through 2.2

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01
• https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01
• https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities

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