Vulnerability in Ltsecurity Ltk3500sf
CVE-2026-47116
LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where the root and guest account passwords are stored in /etc/shadow as weak hashes recoverable with dictionary-based cracking tools. The recovered credentials authenticate against the device's Telnet and SSH services and grant root-level access to the operating system. These services are not confirmed to start automatically at boot, so exploitation requires Telnet or SSH to be running, whether enabled by the device configuration or started manually.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Ltsecurity Ltk3500sf — versions AC3F_V1.1.0_build191121
Weakness classification (CWE)
References
- github.com/AndreaLandriscina/Hardcoded-Credentials-in-LTSecurity-LTK3500SF (technical-description, exploit)
- www.vulncheck.com/advisories/ltsecurity-ltk3500sf-hard-coded-credentials-via-te… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-47116?
- CVE-2026-47116 is a critical-severity vulnerability in Ltsecurity Ltk3500sf, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-09-22.
- How severe is CVE-2026-47116?
- Critical severity. CVSS v3 base score is 9.8 out of 10.