CVE-2021-32968: moxa nport iaw5000a-i/o series firmware Classic Buffer Overflow
CVSS: 7.5v3.1HighModified
Published 01-04-2022Last modified 16-04-2025
Vulnerability summary
CVE-2021-32968 is a high (CVSS 7.5) Classic Buffer Overflow vulnerability in moxa nport iaw5000a-i/o series firmware. EPSS estimates a 1.70% chance of exploitation in the next 30 days, higher than 77% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
1.70%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 01-04-2022PublishedVulnerability first disclosed.
- 16-04-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.70%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.70% on 21-09-2026
21-09-202621-10-2026
EPSS score1.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Moxa5 products
- nport iaw5000a-i/o series firmware≥ unspecified, ≤ 2.2
- nport_iaw5150a-12i\/o_firmware≤ 2.2
- nport_iaw5150a-6i\/o_firmware≤ 2.2
- nport_iaw5250a-12i\/o_firmware≤ 2.2
- nport_iaw5250a-6i\/o_firmware≤ 2.2
1 vendor · 5 products
References
2 links
www.cisa.gov/uscert/ics/advisories/icsa-21-187-01X Refsource CONFIRMMitigationThird Party AdvisoryUS Government Resource