A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument mode leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used.
CVE-2026-5978
CRITICALNVD 9.89.8—Elevated
EchelonGraph scoreMEDIUM confidence
Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-09. NVD baseline CVSS 9.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 75.6%
- KEV
- Not listed
Published
April 9, 2026
Last Modified
April 27, 2026
Advisory Details (3)
Auto-updated May 10, 2026🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available
vuldb_new/A7100RU/vul_164/README.md at main · Litengzheng/vuldb_new · GitHub
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_164/README.mdgeneric
Submit #791825: Totolink A7100RU 7.4cu.2313_b20191024 Command Injection
https://vuldb.com/submit/791825Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2026-5978?
CVE-2026-5978 is a critical vulnerability published on April 9, 2026. A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument mode leads to os command injection. The attack can be initiated remotely. The…
When was CVE-2026-5978 disclosed?
CVE-2026-5978 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5978 actively exploited?
CVE-2026-5978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5978?
CVE-2026-5978 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-5978?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5978, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-5978
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