CVE-2025-34239: advantech webaccess\/vpn OS Command Injection
CVSS: 8.6v4.0HighAnalyzed
Published 06-11-2025Last modified 17-11-2025
Vulnerability summary
CVE-2025-34239 is a high (CVSS 8.6) OS Command Injection vulnerability in advantech webaccess\/vpn. EPSS estimates a 1.70% chance of exploitation in the next 30 days, higher than 76.9% of scored vulnerabilities.
CVSS score
8.6/10
010
High · v4.0 (CVE.org)EPSS score
1.70%
0%100%
Low · -0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 06-11-2025PublishedVulnerability first disclosed.
- 17-11-2025Last modifiedVulnerability information updated.
Description
Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.6Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NSourcesAll 2 agree
- NVDNIST8.6HighCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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
High 7.2Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
EPSS trend
Probability
1.70%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
-0.04 pp
From 1.74% on 21-09-2026
21-09-202621-10-2026
EPSS score1.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Advantech1 product
- webaccess\/vpn< 1.1.5
1 vendor · 1 product
References
3 links- icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdfVendor AdvisoryPatchRelease Notes