CVE-2026-5990
Published: 10 April 2026
Summary
CVE-2026-5990 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 39.5th 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-2026-5990 is a stack-based buffer overflow vulnerability affecting the fromSafeEmailFilter function in the /goform/SafeEmailFilter file of Tenda F451 firmware version 1.0.0.7. The flaw is triggered by manipulation of the "page" argument, as documented in the CVE description published on 2026-04-10. It is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow), with 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).
A remote attacker with low privileges can exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation enables high confidentiality, integrity, and availability impacts, potentially allowing arbitrary code execution on the affected device.
Advisories and additional details are available at referenced sources including https://github.com/Jimi-Lab/cve/issues/8, https://vuldb.com/?submit/792861, https://vuldb.com/vuln/356544, https://vuldb.com/vuln/356544/cti, and the vendor site https://www.tenda.com.cn/. The exploit has been publicly disclosed and may be used.
The vulnerability's public exploit disclosure heightens the risk for unpatched Tenda F451 devices.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-21242
Vulnerability details
A vulnerability has been found in Tenda F451 1.0.0.7. Affected by this vulnerability is the function fromSafeEmailFilter of the file /goform/SafeEmailFilter. The manipulation of the argument page leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit…
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has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote stack-based buffer overflow in public-facing web form (/goform/SafeEmailFilter) on network device firmware, directly enabling exploitation for RCE via T1190.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires timely remediation of known flaws like this stack-based buffer overflow through patching the vulnerable Tenda F451 firmware.
Mandates validation of inputs such as the 'page' argument to prevent improper restriction of operations leading to buffer overflows.
Implements memory safeguards like stack canaries or DEP to protect against exploitation of stack-based buffer overflows for arbitrary code execution.