Vulnerability Details : CVE-2021-40556

A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3.0.0.4.386.44266. This vulnerability is caused by the strcat function called by "caupload" input handle function allowing the user to enter 0xFFFF bytes into the stack. This vulnerability allows an attacker to execute commands remotely. The vulnerability requires authentication.
Published 2022-10-06 18:15:50
Updated 2022-10-07 17:39:33
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Exploit prediction scoring system (EPSS) score for CVE-2021-40556

EPSS FAQ
0.17%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-40556

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.8
 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
 NIST

CWE ids for CVE-2021-40556

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-40556

Products affected by CVE-2021-40556

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