PT-2026-3394 · Totolink · Totolink A3700R

Wxhwxhwxh_Mie · Published 2026-01-09 · Updated 2026-01-29 · CVE-2026-1143

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 A3700R version 9.1.2u.5822 B20200513

Description A flaw exists in TOTOLINK A3700R. A buffer overflow can occur through manipulation of the ssid argument within the setWiFiEasyGuestCfg function located in the /cgi-bin/cstecgi.cgi file. This issue may be exploited remotely. The exploit has been publicly released.

Recommendations TOTOLINK A3700R version 9.1.2u.5822 B20200513: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2026-00629

CVE-2026-1143

Affected Products

Totolink A3700R

References · 16

• 🔥 https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link · Exploit
• https://osv.dev/vulnerability/CVE-2026-1143 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00629 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-1143 · Security Note
• https://vuldb.com/?id.341735 · Note
• https://twitter.com/CveFindCom/status/2013154196317405645 · Twitter Post
• https://t.me/cveNotify/150300 · Telegram Post
• https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff · Note
• https://vuldb.com/?submit.735502 · Note
• https://twitter.com/TheHackerWire/status/2013149861969846620 · Twitter Post
• https://twitter.com/cracbot/status/2015016787541414308 · Twitter Post
• https://twitter.com/CVEnew/status/2013155585672253776 · Twitter Post
• https://vuldb.com/?ctiid.341735 · Note
• https://twitter.com/VulmonFeeds/status/2013155276979929269 · Twitter Post
• https://twitter.com/vuldb/status/2012802657170477483 · Twitter Post