Skip to main content
Live Webinar with SANS (June 25)— Agentic CTI Automation for Fun & ProfitRegister Free
Mallory
Back to vulnerabilities
HighPublic exploit

OS Command Injection in Totolink A8000RU setWiFiEasyCfg

IdentifiersCVE-2026-7125CWE-78· Improper Neutralization of Special…

CVE-2026-7125 is an OS command injection vulnerability affecting Totolink A8000RU firmware version 7.1cu.643_b20200521. The flaw is present in the CGI Handler component, specifically in the setWiFiEasyCfg function of /cgi-bin/cstecgi.cgi. According to the provided content, improper handling of the merge argument allows attacker-controlled input to be incorporated into operating system command execution, resulting in command injection. The issue is remotely reachable over the network, and public exploit material is available.

Share:
For your environment

Are you exposed to this one?

Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.

Start free trial
ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow a remote attacker to execute arbitrary operating system commands on the affected device without requiring privileges or user interaction. Based on the provided severity information, the impact is high across confidentiality, integrity, and availability, which can translate into full compromise of the router, unauthorized configuration changes, access to sensitive data handled by the device, service disruption, and potential use of the device as a foothold for further network activity.

Mitigation

If you can’t patch tonight, do this now.

Restrict network access to the router's administrative and CGI interfaces, especially from untrusted networks and the internet. Disable remote administration if not strictly required. Place management interfaces behind trusted internal networks or ACLs, and monitor for suspicious requests targeting /cgi-bin/cstecgi.cgi and the setWiFiEasyCfg functionality. If patching is unavailable, consider isolating the device or replacing it with supported hardware.

Remediation

Patch, then assume compromise.

Upgrade to a vendor-fixed firmware release if one is available from Totolink. Because the provided content identifies the affected version as 7.1cu.643_b20200521 but does not specify a patched version, the exact fixed release is currently not available from the supplied information. Review vendor advisories and firmware release notes, and replace or retire the device if no security update is provided.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
TotolinkA8000ruhardware
TotolinkA8000ru Firmwareoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Start free trial
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-7125
NVD
nvd.nist.gov/vuln/detail/CVE-2026-7125
MITRE CWE · CWE-78
Improper Neutralization of Special Elements…
github.com
github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_310/README.md
vuldb.com
vuldb.com/submit/801006
vuldb.com
vuldb.com/vuln/359724
vuldb.com
vuldb.com/vuln/359724/cti
totolink.net
totolink.net