What is CVE-2023-43138?

CVE-2023-43138 is a high-severity vulnerability in TP-Link Tl-Er5120g, classified under Command Injection. CVSS score: 8.8/10. Published 2023-09-20.

How severe is CVE-2023-43138?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in TP-Link Tl-Er5120g

CVE-2023-43138

TPLINK 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 the rule name has an injection point.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.024 · change: +0.004

Affected products

TP-Link Tl-Er5120g — versions 4.0
TP-Link Tl-Er5120g Firmware — versions 2.0.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

github.com/7R4C4R/CVE/blob/main/TPLINK-TL-ER5120G/command injection/02/command… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-43138?: CVE-2023-43138 is a high-severity vulnerability in TP-Link Tl-Er5120g, classified under Command Injection. CVSS score: 8.8/10. Published 2023-09-20.
How severe is CVE-2023-43138?: High severity. CVSS v3 base score is 8.8 out of 10.