HOMEVULNERABILITIESCVE-2026-7243
CRITICAL

CVE-2026-7243

CWE-77Published: April 28, 2026· Updated: Apr 28, 2026

9.8
CVSS v3.1
EPSS:0.89%probability of exploitation in 30 daysPercentile:75.7th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-7243 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (5)

→
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_327/README.md
→
https://vuldb.com/submit/803266
→
https://vuldb.com/vuln/359850
→
https://vuldb.com/vuln/359850/cti
→
https://www.totolink.net/

Quick Facts

CVE IDCVE-2026-7243
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-77
CISA KEVNo
EPSS (30d)0.89%
PublishedApr 28, 2026

Related CVEs (CWE-77)

CVE-2025-15379
10.0
CVE-2026-20147
9.9
CVE-2026-45663
9.9
CVE-2026-26068
9.9
CVE-2026-20186
9.9
CVE-2026-38704
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-7243 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-7243·NVD
CVE-2026-7243 — CVSS 9.8 CRITICAL | CTIWATCH.COM