CVE-2021-40556

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
8.8HIGH
EPSS
1.1%
top 22.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Asus Rt-ax56u Firmware
Timeline
PublishedOct 6

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages1 packages

▶NVDasus/rt-ax56u_firmware3.0.0.4.386.44266

🔴Vulnerability Details

2
GHSA
GHSA-9v8q-97m7-4x6q: A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3↗2022-10-06
▶
CVEList
CVE-2021-40556: A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3↗2022-10-06
▶
CVE-2021-40556 (HIGH CVSS 8.8) | A stack overflow vulnerability exis | cvebase.io