CVE-2026-6200
Published: 13 April 2026
Summary
CVE-2026-6200 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Com (inferred from references). Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 35.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-6200 is a stack-based buffer overflow vulnerability affecting the Tenda F456 router on firmware version 1.0.0.5. The flaw exists in the formwebtypelibrary function within the /goform/webtypelibrary file, triggered by manipulation of the menufacturer/Go argument. Published on 2026-04-13, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and maps to CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow).
The vulnerability enables remote exploitation by attackers with low privileges, such as authenticated users, requiring low attack complexity and no user interaction. Exploitation can result in high impacts to confidentiality, integrity, and availability, potentially leading to full device compromise including arbitrary code execution.
Advisories referenced in VulDB entries (vuldb.com/vuln/357122 and related pages) and a GitHub proof-of-concept repository (github.com/Litengzheng/vuldb_new/blob/main/F456/vul_117/README.md) detail the issue, with the Tenda manufacturer's site (tenda.com.cn) listed for potential updates. The exploit has been publicly disclosed and may be utilized.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-22065
Vulnerability details
A vulnerability was determined in Tenda F456 1.0.0.5. The affected element is the function formwebtypelibrary of the file /goform/webtypelibrary. This manipulation of the argument menufacturer/Go causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been publicly…
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disclosed and may be utilized.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in router web form (/goform/webtypelibrary) enables remote authenticated RCE on a network-accessible device, directly facilitating exploitation of public-facing applications.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the stack-based buffer overflow in the formwebtypelibrary function by applying vendor firmware patches or updates.
Enforces validation of the manipulated 'menufacturer/Go' argument to prevent stack-based buffer overflow in the /goform/webtypelibrary endpoint.
Provides memory protections like stack canaries and address space layout randomization to block exploitation of the stack-based buffer overflow.