A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument maxRtrAdvInterval leads to os command injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
CVE-2026-7243
CRITICALNVD 9.89.8—Elevated
EchelonGraph scoreMEDIUM confidence
Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-28. 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
- 82.5%
- KEV
- Not listed
Published
April 28, 2026
Last Modified
April 28, 2026
Advisory Details (4)
Auto-updated May 10, 2026🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available
vuldb_new2/A8000RU/vul_327/README.md at main · Litengzheng/vuldb_new2 · GitHub
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_327/README.mdgeneric🟡 PoC Available
CVE-2026-7243 Totolink A8000RU CGI cstecgi.cgi setRadvdCfg os command injection
https://vuldb.com/vuln/359850generic
Submit #803266: Totolink A8000RU 7.1cu.643_b20200521 Command Injection
https://vuldb.com/submit/803266Frequently asked(5)
What is CVE-2026-7243?
CVE-2026-7243 is a critical vulnerability published on April 28, 2026. A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument maxRtrAdvInterval leads to os command injection. It is possible to initiate the…
When was CVE-2026-7243 disclosed?
CVE-2026-7243 was first published in the National Vulnerability Database on April 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7243 actively exploited?
CVE-2026-7243 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7243?
CVE-2026-7243 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-7243?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7243, 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-2026-7243
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