RCE in Totolink Ca750-Poe
CVE-2026-9531
A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.018 (77.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.108 · newest: 0.018 · change: -0.090
Affected products
- Totolink Ca750-Poe — versions 6.2c.510
Weakness classification (CWE)
References
- vuldb.com/vuln/365558 (technical-description, vdb-entry)
- vuldb.com/vuln/365558/cti (signature, permissions-required)
- vuldb.com/submit/813929 (third-party-advisory)
- github.com/wudipjq/my_vuln/blob/main/totolink4/vuln_54/54.md (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-9531?
- CVE-2026-9531 is a medium-severity vulnerability in Totolink Ca750-Poe, classified under Command Injection. CVSS score: 6.3/10. Published 2026-05-26.
- How severe is CVE-2026-9531?
- Medium severity. CVSS v3 base score is 6.3 out of 10.