Vulnerability · Published May 26, 2026 · Assigned by VulDB

CVE-2026-9531Totolink CA750-PoE Setting cstecgi.cgi setUpgradeUboot os command injection

Medium 6.3

In plain English

A medium-severity OS command injection in CA750-PoE from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 10.4% (higher than 96% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)10.4%top 4.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Totolink	CA750-PoE	6.2c.510

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-365558 | Totolink CA750-PoE Setting cstecgi.cgi setUpgradeUboot os command injection vdb-entry, technical-description
VDB-365558 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #813929 | TOTOLink CA750-PoE V6.2c.510 Command Injection third-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/totolink4/vuln_54/54.md exploit
https://www.totolink.net/ product