What is CVE-2023-27720?

CVE-2023-27720 is a critical-severity vulnerability in Dlink Dir-878, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-09.

How severe is CVE-2023-27720?

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

Buffer overflow in Dlink Dir-878

CVE-2023-27720

D-Link DIR878 1.30B08 was discovered to contain a stack overflow in the sub_48d630 function. This vulnerability allows attackers to cause a Denial of Service (DoS) or execute arbitrary code via a crafted payload.

Vulnerability class: Buffer Overflow

Published 2023-04-09 · 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: 0.014 (70.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Dlink Dir-878
Dlink Dir-878 Firmware — versions 1.30b08

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
github.com/HolyTruth/DIR_878-1.30B08/blob/main/4.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-27720?: CVE-2023-27720 is a critical-severity vulnerability in Dlink Dir-878, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-04-09.
How severe is CVE-2023-27720?: Critical severity. CVSS v3 base score is 9.8 out of 10.