RCE in Totolink N300rh
CVE-2026-6158
A flaw has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setUpgradeUboot of the file upgrade.so. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.021 (80.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.021 · change: +0.007
Affected products
- Totolink N300rh — versions 6.1c.1353_B20190305
Weakness classification (CWE)
References
- vuldb.com/vuln/357038 (technical-description, vdb-entry)
- vuldb.com/vuln/357038/cti (signature, permissions-required)
- vuldb.com/submit/796426 (third-party-advisory)
- github.com/xyh4ck/iot_poc/tree/main/TOTOLINK/N300RHv4/02_setUpgradeUboot_RCE (exploit, patch)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-6158?
- CVE-2026-6158 is a high-severity vulnerability in Totolink N300rh, classified under Command Injection. CVSS score: 7.3/10. Published 2026-04-13.
- How severe is CVE-2026-6158?
- High severity. CVSS v3 base score is 7.3 out of 10.