TI-2025-05561 Aliases CVE-2025-6151 GHSA-pc68-4m2q-7jqf

TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow

HIGH 71CWE-119Published 2025-06-17 · Updated 2025-07-15

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A vulnerability has been found in TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unknown functionality of the file /userRpm/WanSlaacCfgRpm.htm, which may lead to buffer overflow. The attack may be launched remotely. This vulnerability only affects products that are no longer supported by the maintainer.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.04952 92nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TP-Link	TL-WR940N V4	up to 160617	—	No fix listed	CNA
TP-Link	TL-WR841N V11	up to 160325	—	No fix listed	CNA

TL-WR940N V4 VendorTP-Link Affected up to 160617 Fixed in — No fix listed CNA
TL-WR841N V11 VendorTP-Link Affected up to 160325 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tp-link:tl-wr940n_firmware:-:::::::*	not specified by NVD	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr940n:v4:::::::*	v4	Running on	TP-Link

cpe:2.3:o:tp-link:tl-wr940n_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr940n:v4:*:*:*:*:*:*:* Versions v4 Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-6151
2026-10-03 Alias added: GHSA-pc68-4m2q-7jqf

References

Exploit 1

https://github.com/WhereisDoujo/CVE/issues/7

Other 1

https://www.tp-link.com/us/support/faq/4536/

TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
TI-2023-18224 TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart… CVSS 3.1CRITICAL 9.9
TI-2019-04924 TP-Link TL-WR940N is vulnerable to a stack-based buffer overflow, caused by improper… CVSS 3.0HIGH 8.8
TI-2024-36696 TP-Link TL-WR940N V3 and V4 with firmware 3.16.9 and earlier contain a buffer overflow… CVSS 3.1HIGH 8.0
TI-2026-09847 OS Command Injection in BigPond Cable (BPA) Configuration in TP-Link TL-WR940N CVSS 4.0HIGH 8.5

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences