Exploit discussion active in current signal (1 latest mentions)
Recommended action window: High priority (within 72h)
NVD description
A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument mac causes os command injection. The attack can be initiated remotely. The exploit has been published and may be used.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-04-13 | 5 | Disclosure2Patch2PoC1 |
| 2026-04-14 | 1 | Patch1 |
🚨 CVE-2026-6138 — CVSS 9.8/10 ██████████ A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setAccessDeviceCfg... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/OMK86g7FDY
Post summary
The tweet discloses a critical vulnerability in Totolink A7100RU, provides basic technical details, and indicates that a patch is available.
🚨 CVE-2026-6138: Tot... Unauthenticated RCE via `mac` parameter in setAccessDeviceCfg - classic router pwn with public exploit already dropped. #RouterPwn #RCE #TotolinkFail. https://zerodaysignal.com/vulnerability/CVE-2026-6138 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The post announces CVE‑2026‑6138, noting an unauthenticated RCE via the ‘mac’ parameter, and confirms that a public exploit has already been released.
🚨 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
The post details critical OS command injection vulnerabilities in Totolink A7100RU CGI handlers, cites published exploits, and urges rapid patching and mitigation.
⚡ New CVE Alert: CVE-2026-6138 📊 Severity: 9.8 🚨 Risk Level: Critical 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-6138 #CVE-2026-6138 #CVE #Critical #CyberSecurity #InfoSec https://t.co/4z8B3zJ0wc
Post summary
The tweet announces CVE‑2026‑6138, a critical vulnerability with a CVSS score of 9.8, but provides no PoC, exploit, or patch details.
CVE-2026-6138 A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the componen… https://www.cve.org/CVERecord?id=CVE-2026-6138
Post summary
The description announces a flaw (CVE-2026-6138) in Totolink A7100RU affecting the setAccessDeviceCfg function within cgi-bin/cstecgi.cgi, providing basic technical details without mentioning PoC, exploit, patch, or active exploitation.
[CVE-2026-6138: CRITICAL] Critical cyber security vulnerability discovered in Totolink A7100RU 7.4cu.2313_b20191024. Remote attackers can execute OS commands via CGI Handler. Patch recommended immediately.#cve,CVE-2026-6138,#cybersecurity https://cvefind.com/CVE-2026-6138
Post summary
A critical vulnerability in the Totolink A7100RU router permits remote OS command execution via the CGI handler, and a patch is urgently recommended.