PT-2026-5234 · Totolink · Totolink A7000R

Xuanyu · Published 2026-01-15 · Updated 2026-02-09 · CVE-2026-1548

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Totolink A7000R version 4.1cu.4154

Description A flaw exists in Totolink A7000R version 4.1cu.4154 that allows for command injection. The issue is located in the CloudACMunualUpdateUserdata function within the /cgi-bin/cstecgi.cgi file. Manipulation of the url argument can trigger the flaw. This attack can be initiated remotely. The exploit has been published.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, restrict access to the /cgi-bin/cstecgi.cgi file.

Exploit

Fix

Command Injection

Special Elements Injection

Weakness Enumeration

CWE-77

CWE-74

Related Identifiers

BDU:2026-00951

CVE-2026-1548

Affected Products

Totolink A7000R

References · 14

• 🔥 https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateUserdata_RCE.md · Exploit
• 🔥 https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateUserdata_RCE.md#poc · Exploit
• https://bdu.fstec.ru/vul/2026-00951 · Security Note
• https://osv.dev/vulnerability/CVE-2026-1548 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1548 · Security Note
• https://t.me/CVEtracker/43207 · Telegram Post
• https://totolink.net · Note
• https://vuldb.com/?id.343232 · Note
• https://t.me/cveNotify/151446 · Telegram Post
• https://twitter.com/CVEnew/status/2016653253946101822 · Twitter Post
• https://vuldb.com/?ctiid.343232 · Note
• https://t.me/cveNotify/150215 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2016757986346025386 · Twitter Post
• https://vuldb.com/?submit.739715 · Note