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CVE-2023-2866

25
FAUCET Score

CVE-2023-2866 describes a critical vulnerability in Advantech WebAccess version 8.4.5, where a maliciously crafted .zip file, loaded by an authenticated user, can lead to the deployment of a web shell, granting an attacker full control over the SCADA server. This vulnerability carries a CVSS score of 7.8 (HIGH), indicating a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While the vulnerability requires user interaction, it can be exploited remotely. Currently, there is no evidence of active exploitation, nor is public exploit code available in Metasploit, Nuclei, or ExploitDB, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.4.5CPE matchmatch criteria
cpe:2.3:a:advantech:webaccess:8.4.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.3
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.14%
Probability of exploitation in next 30 days
EPSS Percentile
3.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0014 is in the 2nd percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / news-events/ics-advisories/icsa-23-150-01
Third Party AdvisoryUS Government Resource