TOTOLINK A3002R/A3002RU HTTP POST Request formIpQoS buffer overflow

published 2025-05-16 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-15398

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

A vulnerability, which was classified as critical, has been found in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615. This issue affects some unknown processing of the file /boafrm/formIpQoS of the component HTTP POST Request Handler. The manipulation of the argument mac leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 17 mo ago (2025-05-16)

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/7.md 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
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	3.0	8.8	CVSS:3.0/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
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:X/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

Affected products

TOTOLINK A3002R
TOTOLINK A3002RU

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

github.com /CH13hh/tmp_store_cc/blob/main/tt/ta/7.md
broken-link, exploit
vuldb.com /?id.309035
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.309035
signature, permissions-required, vdb-entry
vuldb.com /?submit.570703
third-party-advisory, vdb-entry
totolink.net /
product

Sources

CVE List CVE-2025-4733
NVD CVE-2025-4733

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