HOMEVULNERABILITIESCVE-2020-12006
CRITICAL

CVE-2020-12006

CWE-23Published: May 8, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Advantech WebAccess Node, Version 8.4.4 and prior, Version 9.0.0. Multiple relative path traversal vulnerabilities exist that may allow a low privilege user to overwrite files outside the application’s control.

NVD Source

Technical Analysis

CVE-2020-12006 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

advantech1 product(s)
webaccess
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.us-cert.gov/ics/advisories/icsa-20-128-01
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-589/
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-595/
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-605/
ADVISORYhttps://www.us-cert.gov/ics/advisories/icsa-20-128-01
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-589/
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-595/
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-605/

All References (8)

→
https://www.us-cert.gov/ics/advisories/icsa-20-128-01Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-20-589/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-20-595/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-20-605/Third Party Advisory · VDB Entry
→
https://www.us-cert.gov/ics/advisories/icsa-20-128-01Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-20-589/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-20-595/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-20-605/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2020-12006
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-23
CISA KEVNo
Affected1 vendor(s)
PublishedMay 8, 2020

Related CVEs (CWE-23)

CVE-2023-3941
10.0
CVE-2026-52813
KEV10.0
CVE-2012-6069
10.0
CVE-2026-33494
10.0
CVE-2026-8326
10.0
CVE-2024-3025
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-12006 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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