CVE-2025-67653VulnerabilityPublished 18 Dec 2025

CVE-2025-67653: Advantech WebAccess/SCADA · Path Traversal

Affects Advantech WebAccess/SCADASource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

4.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Advantech WebAccess/SCADA	Affected =9.2.1	Fixed in–

AI-suggested

1. Apply vendor patches immediately once available to address the directory traversal flaw in WebAccess/SCADA 9.2.1. 2. Until patches are released, implement strict input validation on all user-supplied file path parameters to prevent traversal sequences such as '../'. 3. Restrict network access to the SCADA management interfaces to trusted IP addresses and use VPNs or secure tunnels for remote access. 4. Employ network segmentation to isolate SCADA systems from general IT networks, minimizing exposure. 5. Monitor logs for unusual file access patterns or failed traversal attempts to detect exploitation attempts early. 6. Conduct regular security assessments and penetration testing focused on directory traversal and related vulnerabilities. 7. Educate operational technology personnel about the risks and signs of exploitation to improve incident response readiness.

Description

CVE-2025-67653 is a medium-severity directory traversal vulnerability in Advantech WebAccess/SCADA version 9.2.1. It allows an attacker with low privileges and no user interaction to determine the existence of arbitrary files on the system. The vulnerability does not impact integrity or availability but can leak sensitive file presence information, potentially aiding further attacks. No known exploits are currently in the wild. European organizations using this SCADA platform, especially in critical infrastructure sectors, may be at risk. Mitigation requires patching or implementing strict input validation and access controls. Countries with significant industrial automation and critical infrastructure deployments of Advantech products are most likely affected. The vulnerability has a CVSS score of 4.

Impact

For European organizations, especially those operating critical infrastructure such as energy, manufacturing, and transportation sectors that rely on Advantech WebAccess/SCADA, this vulnerability poses a risk of information disclosure. Attackers could use the directory traversal flaw to map the file system and identify sensitive configuration files, credentials, or system information, which could facilitate more severe attacks like privilege escalation or lateral movement. Although the vulnerability does not directly compromise system integrity or availability, the information gained can weaken the overall security posture. Given the strategic importance of industrial control systems in Europe, exploitation could disrupt operational continuity or lead to targeted attacks on critical services. The medium severity rating suggests that while immediate damage may be limited, the vulnerability should not be ignored, particularly in high-value environments.

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #6OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks…
Implementation · Input Validation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174).
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V12.3.1 (opens in a new tab)
Attack patterns
Path Traversal (opens in a new tab)
Using Slashes and URL Encoding Combined to Bypass Validation Logic (opens in a new tab)
Manipulating Web Input to File System Calls (opens in a new tab)
Using Escaped Slashes in Alternate Encoding (opens in a new tab)
Using Slashes in Alternate Encoding (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Dec 2025, 21:13 UTC

WeaknessesCWE-22

Technical details

References

Community reviews

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