8.8

CVE-2021-40396: advantech deviceon\/iservice Incorrect Default Permissions

Modified
Published 28-01-2022Last modified 15-04-2025

Vulnerability summary

CVE-2021-40396 is a high (CVSS 8.8) Incorrect Default Permissions vulnerability in advantech deviceon\/iservice. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 29.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.0 (CVE.org)
EPSS score
0.36%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Timeline

  1. 28-01-2022
    PublishedVulnerability first disclosed.
  2. 15-04-2025
    Last modifiedVulnerability information updated.

Description

A privilege escalation vulnerability exists in the installation of Advantech DeviceOn/iService 1.1.7. A specially-crafted file can be replaced in the system to escalate privileges to NT SYSTEM authority. An attacker can provide a malicious file to trigger this vulnerability.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.36% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (talosintelligence.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Advantech1 product

1 vendor · 1 product

References

1 links