CVE-2021-27114 — Out-of-bounds Write in Dlink Dir-816 Firmware

CWE-787 — Out-of-bounds Write4 documents4 sources
Severity
9.8CRITICALNVD
EPSS
1.9%
top 16.93%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Dlink Dir-816 Firmware
Timeline
PublishedApr 14
Latest updateNov 13

Description

An issue was discovered in D-Link DIR-816 A2 1.10 B05 devices. Within the handler function of the /goform/addassignment route, a very long text entry for the"'s_ip" and "s_mac" fields could lead to a Stack-Based Buffer Overflow and overwrite the return address.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

🔴Vulnerability Details

2
GHSA
GHSA-h8c7-76x8-mr96: An issue was discovered in D-Link DIR-816 A2 1↗2022-05-24
▶
CVEList
CVE-2021-27114: An issue was discovered in D-Link DIR-816 A2 1↗2021-04-14
▶

🔍Detection Rules

1
Suricata
ET WEB_SPECIFIC_APPS D-Link lan Multiple Parameters Buffer Overflow Attempt (CVE-2021-27114)↗2025-11-13
▶
CVE-2021-27114 — Out-of-bounds Write in Dlink | cvebase