What is CVE-2023-39638?

CVE-2023-39638 is a critical-severity vulnerability in Dlink Dir-859 A1, classified under Command Injection. CVSS score: 9.8/10. Published 2023-09-14.

How severe is CVE-2023-39638?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-39638 known to be exploited?

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

RCE in Dlink Dir-859 A1

CVE-2023-39638

D-LINK DIR-859 A1 1.05 and A1 1.06B01 Beta01 was discovered to contain a command injection vulnerability via the lxmldbc_system function at /htdocs/cgibin.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-09-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.037 (89.4th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.037 · change: +0.007

Affected products

Dlink Dir-859 A1
Dlink Dir-859 A1 Firmware — versions 1.05, 1.06

Weakness classification (CWE)

CWE-77 — Command Injection

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.dlink.com/en/security-bulletin/ (Product)
www.dlink.com.cn/techsupport/ProductInfo.aspx (Product)
github.com/mmmmmx1/dlink/blob/main/dir-859/readme.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-39638?: CVE-2023-39638 is a critical-severity vulnerability in Dlink Dir-859 A1, classified under Command Injection. CVSS score: 9.8/10. Published 2023-09-14.
How severe is CVE-2023-39638?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-39638 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.