TI-2023-18225 Aliases CVE-2023-36356 GHSA-56f7-mw56-5449

TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were…

LOW 35CWE-125Published 2023-06-22 · Updated 2024-12-02

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were discovered to contain a buffer read out-of-bounds via the component /userRpm/VirtualServerRpm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00714 53rd 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: None
Automatable: No
Technical impact: Partial

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
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

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-wr841n_firmware:-:::::::*	not specified by NVD	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr841n:v8:::::::*	v8	Running on	TP-Link
cpe:2.3:o:tp-link:tl-wr740n_firmware:-:::::::*	not specified by NVD	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr740n:v1:::::::*	v1	Running on	TP-Link
cpe:2.3:h:tp-link:tl-wr740n:v2:::::::*	v2	Running on	TP-Link
cpe:2.3:h:tp-link:tl-wr940n:v2:::::::*	v2	Running on	TP-Link
cpe:2.3:o:tp-link:tl-wr941nd_firmware:-:::::::*	not specified by NVD	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr941nd:v5:::::::*	v5	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
cpe:2.3:o:tp-link:tl-wr841n_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr841n:v8:*:*:*:*:*:*:* Versions v8 Running on ·TP-Link
cpe:2.3:o:tp-link:tl-wr740n_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr740n:v1:*:*:*:*:*:*:* Versions v1 Running on ·TP-Link
cpe:2.3:h:tp-link:tl-wr740n:v2:*:*:*:*:*:*:* Versions v2 Running on ·TP-Link
cpe:2.3:h:tp-link:tl-wr940n:v2:*:*:*:*:*:*:* Versions v2 Running on ·TP-Link
cpe:2.3:o:tp-link:tl-wr941nd_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr941nd:v5:*:*:*:*:*:*:* Versions v5 Running on ·TP-Link

Show 1 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:h:tp-link:tl-wr940n:v6:::::::*	v6	Running on	TP-Link

cpe:2.3:h:tp-link:tl-wr940n:v6:*:*:*:*:*:*:* Versions v6 Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-36356
2026-10-03 Alias added: GHSA-56f7-mw56-5449

References

Exploit 1

https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/4/TL-WR941ND_TL-WR940N_TL-WR740N_userRpm_VirtualServerRpm.md

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-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
TI-2022-03934 TP-Link TL-WR740N ARP resource consumption CVSS 3.1MEDIUM 6.5
TI-2023-18223 TP-Link TL-WR940N V4, TL-WR841N V8/V10, TL-WR740N V1/V2, TL-WR940N V2/V3, and TL-WR941ND… CVSS 3.1HIGH 7.5
TI-2023-16570 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… CVSS 3.1HIGH 8.1

See all 9 →

Sources

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