TOTOLINK T10 POST Request cstecgi.cgi setWiFiAclRules buffer overflow

published 2025-06-09 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-17612

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 12.1%; EPSS 12.1% chance of exploitation in 30 days, percentile 96%
public exploits: 0; none known

A vulnerability was found in TOTOLINK T10 4.1.8cu.5207. It has been classified as critical. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument desc leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 16 mo ago (2025-06-10)

Exploit prediction

12.12% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

candle-throne-f75.notion.site https://candle-throne-f75.notion.site/TOTOLINK-T10-setWiFiAclRules-20bdf0aa118580399a8df6ba2a44c197 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
CNA	4.0	7.4	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

TOTOLINK T10

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

candle-throne-f75.notion.site /TOTOLINK-T10-setWiFiAclRules-20bdf0aa118580399a8df6ba2a44c197
exploit, third-party-advisory
vuldb.com /?id.311676
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.311676
signature, permissions-required, vdb-entry
vuldb.com /?submit.592247
third-party-advisory, vdb-entry
totolink.net /
product

Sources

CVE List CVE-2025-5903
NVD CVE-2025-5903

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary