CVE-2021-40397 | BDVDB-2026-168809 Detail

Description#

A privilege escalation vulnerability exists in the installation of Advantech WISE-PaaS/OTA Server 3.0.9. 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.

Impact#

Per CVSS v3.0: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.

Weaknesses#

CWE-276 Incorrect Default Permissions

References#

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1409

Exploit#

No public exploit known

History#

Version 12022-01-28Record published in the CVE List.
Version 22025-04-15Most recent update recorded in the CVE List.

Published

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

Vendor information

Vendor: Not stated
Product: Not stated

Score

8.8 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 59.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Incorrect Permissions

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

Not available

CVSS v3.0

8.8 High

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).