CVE-2021-38408: advantech webaccess Stack-based Buffer Overflow
CVSS: 9.8v3.1CriticalModified
Published 09-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-38408 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in advantech webaccess. EPSS estimates a 11.57% chance of exploitation in the next 30 days, higher than 96% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
11.57%
0%100%
Medium · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the length of user-supplied data may allow remote code execution.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
11.57%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 11.57% on 22-09-2026
22-09-202622-10-2026
EPSS score11.57%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Advantech1 product
- webaccess≤ 9.02
1 vendor · 1 product
References
1 links
us-cert.cisa.gov/ics/advisories/icsa-21-245-03X Refsource MISCThird Party AdvisoryUS Government Resource