TI-2023-23111 Aliases CVE-2023-43135 GHSA-hcgj-5w78-pg79

There is an unauthorized access vulnerability in TP-LINK ER5120G 4.0 2.0.0 Build 210817…

MEDIUM 51CWE-862Published 2023-09-20 · Updated 2024-09-25

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-862.

Summary

There is an unauthorized access vulnerability in TP-LINK ER5120G 4.0 2.0.0 Build 210817 Rel.80868n, which allows attackers to obtain sensitive information of the device without authentication, obtain user tokens, and ultimately log in to the device backend management.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00919 60th 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: Yes
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
—	—	all versions	—	No fix listed	CNA

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

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:tp-link:tl-er5120g_firmware:2.0.0:build_210817::::::	2.0.0 build_210817	Vulnerable	TP-Link
cpe:2.3:h:tp-link:tl-er5120g:4.0:::::::*	4.0	Running on	TP-Link

cpe:2.3:o:tp-link:tl-er5120g_firmware:2.0.0:build_210817:*:*:*:*:*:* Versions 2.0.0 build_210817 Vulnerable ·TP-Link
cpe:2.3:h:tp-link:tl-er5120g:4.0:*:*:*:*:*:*:* Versions 4.0 Running on ·TP-Link

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-43135
2026-10-03 Alias added: GHSA-hcgj-5w78-pg79

References

Exploit 1

https://github.com/7R4C4R/CVE/blob/main/TPLINK-TL-ER5120G/unauthorized%20access/Unauthorized%20Access%20Vulnerability.md

TI-2023-23113 TPLINK TL-ER5120G 4.0 2.0.0 Build 210817 Rel.80868n has a command injection… CVSS 3.1HIGH 8.8
TI-2017-12489 TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to… CVSS 3.0HIGH 8.8
TI-2023-23112 TPLINK TL-ER5120G 4.0 2.0.0 Build 210817 Rel.80868n has a command injection… CVSS 3.1HIGH 8.8
TI-2017-12492 TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to… CVSS 3.0HIGH 8.8
TI-2017-12490 TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to… CVSS 3.0HIGH 8.8
TI-2017-12491 The locale feature in cgi-bin/luci on TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices… CVSS 3.0MEDIUM 6.5

Sources

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