CVE-2026-121597

CRITICAL 9.9

TOTOLINK A950RG Easy Setup Wizard cstecgi.cgi setAppEasyWizardConfig stack-based overflow

CVSS Score

9.9

EPSS Score

0.0%

EPSS Percentile

0th

A weakness has been identified in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This affects the function setAppEasyWizardConfig of the file /cgi-bin/cstecgi.cgi of the component Easy Setup Wizard Handler. Executing a manipulation of the argument functionType can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

CWE	CWE-121 CWE-119
Vendor	totolink
Product	a950rg
Published	Nov 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

TOTOLINK / A950RG

4.1.2cu.5268_B20221104

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/430439 vuldb.com: https://vuldb.com/vuln/430439/cti vuldb.com: https://vuldb.com/cve/CVE-2026-121597 vuldb.com: https://vuldb.com/submit/1022558 gist.github.com: https://gist.github.com/H3rmesk1t/49d6ccded59379651568e0bdc6b5624c totolink.net: https://www.totolink.net/

Credits

🔍 LiuYijun_JX.SGCC (VulDB User)