PT-2026-21551 · Totolink+1 · Totolink X5000R+1

Published 2025-10-22 · Updated 2026-02-28 · CVE-2025-70327

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions TOTOLINK X5000R version 9.1.0cu 2415 B20250515

Description The software contains an argument injection flaw in the setDiagnosisCfg handler of the /usr/sbin/lighttpd executable. The ip parameter, obtained using websGetVar, is passed to a ping command through CsteSystem without proper validation to prevent inputs starting with a hyphen (-). This allows authenticated remote attackers to inject arbitrary command-line options into the ping utility, potentially causing a Denial of Service (DoS) through excessive resource usage or prolonged execution.

Recommendations Update to a newer version that contains a fix for this vulnerability.

Exploit

Fix

Resource Exhaustion

Argument Injection

Weakness Enumeration

CWE-400

CWE-88

Related Identifiers

BDU:2026-02541

CVE-2025-70327

Affected Products

Totolink X5000R

Lighttpd

References · 10

• 🔥 https://github.com/neighborhood-H/0-DAY/blob/main/Toto-link/X5000R/SetDiagnosisCfg/report.md · Exploit
• 🔥 https://notion.so/TOTOLINK-X5000R-SetDiagnosisCfg-2d170566ca7f8098a0bcee9f2a15d40d?source=copy_link · Exploit
• https://osv.dev/vulnerability/CVE-2025-70327 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02541 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-70327 · Security Note
• https://twitter.com/cracbot/status/2027338100301779313 · Twitter Post
• https://twitter.com/CVEnew/status/2026265054094455011 · Twitter Post
• https://notion.so/TOTOLINK-X5000R-SetDiagnosisCfg-2d170566ca7f8098a0bcee9f2a15d40d · Note
• https://twitter.com/cracbot/status/2027700400183513160 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2026077051074007191 · Twitter Post