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Vulnerability record · CVE-2023-43135 · published 20 September 2023

CVE-2023-43135: Tp-link tl-er5120g firmware missing authorization vulnerability

Tp Link · Tl Er5120g Firmware

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.

9.8 CVSS 3.1 Critical EPSS 0.92% · top 41.3% CWE-862 · Missing authorization
9.8CVSS 3.1 base score
0.92%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-43137Tp-link tl-er5120g firmware command injection vulnerabilityTPLINK TL-ER5120G 4.0 2.0.0 Build 210817 Rel.80868n has a command injection vulnerability, when an attacker adds ACL rules after authentication, and …EPSS 2.4%8.8CVE-2023-43138Tp-link tl-er5120g firmware command injection vulnerabilityTPLINK TL-ER5120G 4.0 2.0.0 Build 210817 Rel.80868n has a command injection vulnerability, when an attacker adds NAPT rules after authentication, and…EPSS 2.4%8.8CVE-2017-16957Tp-link tl-wvr300 firmware os command injection vulnerabilityTP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to execute arbitrary commands via shell metacharacters in the iface …EPSS 5.6%8.8CVE-2017-16958Tp-link tl-wvr300 firmware os command injection vulnerabilityTP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to execute arbitrary commands via shell metacharacters in the t_bind…EPSS 2.9%8.8CVE-2017-16960Tp-link tl-er5510g os command injection vulnerabilityTP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to execute arbitrary commands via shell metacharacters in the t_bind…EPSS 2.4%6.5CVE-2017-16959Tp-link tl-wvr300 firmware path traversal vulnerabilityThe locale feature in cgi-bin/luci on TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allows remote authenticated users to test for the existence of …EPSS 1.9%9.9CVE-2026-84869ScreenConnect client allows unauthorized file transfer and execution in remote sessionsA flaw in the ConnectWise ScreenConnect client lets files be transferred and executed inside an active remote session without authorization or Host c…KEVEPSS 0.92%analysed7.8CVE-2022-0492Linux kernel cgroups v1 release_agent privilege escalation and container escapeThe Linux kernel's cgroup_release_agent_write in kernel/cgroup/cgroup-v1.c mishandles authorization, letting the cgroups v1 release_agent feature be …KEVEPSS 5.5%analysed

Source: NIST National Vulnerability Database (record CVE-2023-43135), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.