Advantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxDeviceController.ajaxDeviceAction()
Advantech WebAccess/VPN versions prior to 1.1.5 contain a SQL injection vulnerability in AjaxDeviceController.ajaxDeviceAction() that allows an authenticated low-privileged observer user to inject SQL via datatable search parameters, leading to disclosure of database information.
- Published
- Nov 6, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 20th percentile
- CWE
- CWE-89
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · VulnCheck
- 5.3
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| advantech | webaccess\/vpn | cpe:2.3:a:advantech:webaccess\/vpn |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- advantech webaccess/vpnbefore 1.1.5
Versions reported by the vendor
Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.
Advantech WebAccess/VPN
- before 1.1.5affected · semver
Same product
advantech: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-34239Advantech WebAccess/VPN < 1.1.5 Command Injection in AppManagementController.appUpgradeAction()35Monitor
- CVE-2025-34242Advantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxNetworkController.ajaxAction()34Monitor
- CVE-2025-34240Advantech WebAccess/VPN < 1.1.5 SQL Injection via AppManagementController.appUpgradeAction()34Monitor
- CVE-2025-34238Advantech WebAccess/VPN < 1.1.5 Path Traversal via AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction()27Monitor
- CVE-2025-34237Advantech WebAccess/VPN < 1.1.5 Stored XSS via StandaloneVpnClientsController.addStandaloneVpnClientAction()25Monitor
- CVE-2025-34236Advantech WebAccess/VPN < 1.1.5 Stored XSS via NetworksController.addNetworkAction()24Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Advantech WebAccess/VPN | 1.1.5 | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Alex WilliamsConverge Technology Solutionsfinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-342400 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AppManagementController.appUpgradeAction()34Monitor
- CVE-2025-342420 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxNetworkController.ajaxAction()34Monitor
- CVE-2025-342430 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxFwRulesController.ajaxNetworkFwRulesAction()21Monitor
- CVE-2025-342440 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxFwRulesController.ajaxDeviceFwRulesAction()21Monitor
- CVE-2025-342450 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxStandaloneVpnClientsController.ajaxAction()21Monitor
- CVE-2025-342460 days apartAdvantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxPrevalidationController.ajaxAction()21Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Root cause
The query text is built by concatenating user input. The database cannot tell where the data ends and the command begins.
The bug in code
The whole CWE-89 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const owner = req.query.owner;const rows = await db.query( "SELECT * FROM files WHERE owner = '" + owner + "'");Fixed
const owner = req.query.owner;const rows = await db.query( "SELECT * FROM files WHERE owner = $1", [owner]);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Expanding Control over the Operating System from the DatabaseCAPEC-470Very High
- SQL InjectionCAPEC-66likelihood: High · High
- Blind SQL InjectionCAPEC-7likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- icr.advantech.com/download/software
- icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf
- www.vulncheck.com/advisories/advantech-webaccess-vpn-sqli-via-ajaxdevicecontroller-ajaxdeviceaction
Vendor advisories and official records. Exploit/PoC links are deliberately left out.