TI-2022-08766 Aliases CVE-2022-24972 GHSA-76hr-hr87-x887

Improper access control in TP-Link TL-WR940N

LOW 30CWE-284Published 2023-03-28 · Updated 2025-02-19

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR940N 3.20.1 Build 200316 Rel.34392n (5553) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of proper access control. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13911.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0058 47th percentileScored 2026-11-07

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
TP-Link	TL-WR940N	3.20.1 Build 200316 Rel.34392n (5553)	—	No fix listed	CNA

TL-WR940N VendorTP-Link Affected 3.20.1 Build 200316 Rel.34392n (5553) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tp-link:tl-wr940n_firmware:3.20.1:build_200316::::::	3.20.1 build_200316	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-wr940n:-:::::::*	not specified by NVD	Running on	TP-Link

cpe:2.3:o:tp-link:tl-wr940n_firmware:3.20.1:build_200316:*:*:*:*:*:* Versions 3.20.1 build_200316 Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-wr940n:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2022-24972
2026-10-03 Alias added: GHSA-76hr-hr87-x887

References

Advisory 1

https://www.zerodayinitiative.com/advisories/ZDI-22-405/

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-2025-05561 TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow CVSS 4.0HIGH 8.2
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

See all 21 →

Sources

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