Exploit discussion active in current signal (2 latest mentions)
Recommended action window: High priority (within 72h)
NVD description
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument FileName leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-04-13 | 4 | Disclosure2Exploit1Patch1 |
| 2026-04-14 | 2 | Patch1PoC1 |
🚨 CVE-2026-6139 — CVSS 9.8/10 ██████████ A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/f1P6Ahgl7R
Post summary
A critical CVE‑2026‑6139 affecting Totolink A7100RU has been disclosed with a CVSS of 9.8/10, and a patch is now available.
[CVE-2026-6139: CRITICAL] Alert: Cybersecurity vulnerability in Totolink A7100RU 7.4cu.2313_b20191024 discovered, enabling remote OS command injection via CGI Handler. Exploit disclosed and may be utilized. #c...#cve,CVE-2026-6139,#cybersecurity https://cvefind.com/CVE-2026-6139
Post summary
An alert reports a critical CVE-2026‑6139 affecting Totolink routers that enables remote OS command injection, with an exploit disclosed but no evidence of active exploitation or patches.
🚨 CVE-2026-6139: Totolink A7100RU CGI cstecgi.cgi ... Totolink's A7100RU router lets attackers inject OS commands through FileName parameter in OpenVPN cert uploads—public ex... https://zerodaysignal.com/vulnerability/CVE-2026-6139 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The tweet announces CVE-2026-6139, explaining that attackers can inject OS commands through the FileName parameter during OpenVPN cert uploads on Totolink routers, with a public exploit referenced.
🚨 Critical CVEs Today: Totolink A7100RU CGI Handler (CVSS 9.8-9.8) Affected: Totolink A7100RU 7.4cu.2313_b20191024 Internet-facing risks dominate, led by remote command injection via CGI Handler vulnerabilities; fixes and mitigations below. • CVE-2026-6138 (CVSS 9.8) Totolink A7100RU 7.4cu.2313_b20191024 vulnerability in function setAccessDeviceCfg of /cgi-bin/cstecgi.cgi; manipulating the mac argument triggers OS command injection; remote exploitation; exploit published. • CVE-2026-6139 (CVSS 9.8) Totolink A7100RU 7.4cu.2313_b20191024 vulnerability in UploadOpenVpnCert of /cgi-bin/cstecgi.cgi; FileName manipulation leads to OS command injection; remote exploitation; exploit published. • CVE-2026-6140 (CVSS 9.8) Totolink A7100RU 7.4cu.2313_b20191024 vulnerability in UploadFirmwareFile of /cgi-bin/cstecgi.cgi; FileName manipulation leads to OS command injection; remote exploitation; exploit published. • CVE-2026-6154 (CVSS 9.8) Totolink A7100RU 7.4cu.2313_b20191024 vulnerability in setWizardCfg of /cgi-bin/cstecgi.cgi; manipulating the wizard argument leads to OS command injection; remote exploitation; exploit published. • CVE-2026-6155 (CVSS 9.8) Totolink A7100RU 7.4cu.2313_b20191024 vulnerability in setWanCfg of /cgi-bin/cstecgi.cgi; manipulating pppoeServiceName leads to OS command injection; remote exploitation; exploit published. Action • Patch/upgrade to the fixed versions called out by the vendor (or latest Totolink firmware) addressing CGI Handler vulnerabilities. • Prioritize internet-facing instances and edge appliances first. • If no fix yet, apply mitigations and reduce exposure (disable affected CGI modules or restrict access). • Add detections for exploitation patterns (process spawning, webshell/file-write paths, unusual param manipulation). • Hunt for indicators around affected services during disclosure-to-now window (logs, EDR, WAF). • Validate remediation (version checks, config verification) and monitor for reversion
Post summary
Multiple Totolink A7100RU firmware variants suffer from OS command injection via the CGI handler; exploits have been published and vendors recommend immediate patching or mitigations.
⚡ New CVE Alert: CVE-2026-6139 📊 Severity: 9.8 🚨 Risk Level: Critical 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-6139 #CVE-2026-6139 #CVE #Critical #CyberSecurity #InfoSec https://t.co/cDYlKKEBdv
Post summary
The tweet announces a newly identified CVE (2026‑6139) with a high severity score and no further technical or mitigation details.
CVE-2026-6139 A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component C… https://www.cve.org/CVERecord?id=CVE-2026-6139
Post summary
A new vulnerability (CVE-2026-6139) was reported in the Totolink A7100RU router, affecting the UploadOpenVpnCert function in cgi-bin/cstecgi.cgi, with no PoC, patch, or active exploitation mentioned.