What is CVE-2023-30383?

CVE-2023-30383 is a high-severity vulnerability in TP-Link Archer C20, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-07-18.

How severe is CVE-2023-30383?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-30383 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in TP-Link Archer C20

CVE-2023-30383

TP-LINK Archer C50v2 Archer C50(US)_V2_160801, TP-LINK Archer C20v1 Archer_C20_V1_150707, and TP-LINK Archer C2v1 Archer_C2_US__V1_170228 were discovered to contain a buffer overflow which may lead to a Denial of Service (DoS) when parsing crafted data.

Vulnerability class: Buffer Overflow

Published 2023-07-18 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

TP-Link Archer C20 — versions 1
TP-Link Archer C20 Firmware — versions 150707
TP-Link Archer C2 V1
TP-Link Archer C2 V1 Firmware — versions 170228
TP-Link Archer C50 — versions 2
TP-Link Archer C50 Firmware — versions 160801

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
www.tp-link.com/us/support/download/archer-c50/v2/
www.tp-link.com/us/support/download/archer-c2/v1/ (Product)
www.tp-link.com/us/support/download/archer-c50/v2/ (Product)
gist.github.com/a2ure123/a4eda2813d85d8b414bb87e855ab4bf8 (Third Party Advisory)

Frequently asked questions

What is CVE-2023-30383?: CVE-2023-30383 is a high-severity vulnerability in TP-Link Archer C20, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-07-18.
How severe is CVE-2023-30383?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-30383 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.