TP-Link VN020 F3v(T) SOAP Request WANIPConnection buffer overflow

published 2024-12-08 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-50788

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.0%; EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

A vulnerability classified as critical has been found in TP-Link VN020 F3v(T) TT_V6.2.1021. Affected is an unknown function of the file /control/WANIPConnection of the component SOAP Request Handler. The manipulation of the argument NewConnectionType leads to buffer overflow. The attack needs to be done within the local network. The exploit has been disclosed to the public and may be used.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2024-12-09)

Exploit prediction

4.96% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Zephkek/TP-WANPunch/blob/main/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.1	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA	3.1	6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.0	6.5	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	2.0	6.1	AV:A/AC:L/Au:N/C:N/I:N/A:C
CNA	4.0	7.1	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
NVD	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

TP-Link VN020 F3v(T)

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 /Zephkek/TP-WANPunch/blob/main/README.md
exploit, broken-link
tp-link.com /
product, vendor-advisory
vuldb.com /?id.287262
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.287262
signature, permissions-required
vuldb.com /?submit.446212
third-party-advisory, vdb-entry

Sources

CVE List CVE-2024-12343
NVD CVE-2024-12343

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