PT-2026-36745 · Totolink · Wa300

Wxhwxhwxh_Mie · Published 2026-05-04 · Updated 2026-06-02 · CVE-2026-7717

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Totolink WA300 version 5.2cu.7112 B20190227

Description A buffer overflow exists in the POST Request Handler component. This issue occurs within the UploadCustomModule() function of the '/cgi-bin/cstecgi.cgi' endpoint. A remote, unauthenticated attacker can trigger this flaw by manipulating the File argument via a malformed POST request, potentially leading to remote code execution.

Recommendations For version 5.2cu.7112 B20190227, update the firmware to a newer version to mitigate the risk. As a temporary workaround, restrict access to the '/cgi-bin/cstecgi.cgi' endpoint to minimize the risk of exploitation.

Exploit

Fix

RCE

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

CVE-2026-7717

Affected Products

Wa300

References · 11

• 🔥 https://lavender-bicycle-a5a.notion.site/TOTOLINK-WA300-UploadCustomModule-34553a41781f80a8a287e48a7fb04de9 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7717 · Security Note
• https://twitter.com/ADKCyber/status/2055430794391539898 · Twitter Post
• https://totolink.net · Note
• https://vuldb.com/submit/807193 · Note
• https://twitter.com/lyrie_ai/status/2061670701564641632 · Twitter Post
• https://vuldb.com/vuln/360893 · Note
• https://t.me/CVEtracker/52607 · Telegram Post
• https://vuldb.com/vuln/360893/cti · Note
• https://twitter.com/lyrie_ai/status/2061670702613221520 · Twitter Post
• https://twitter.com/lyrie_ai/status/2061670703720468673 · Twitter Post