D-Link DWR-M921 Boa Dispatch Table formsysCmd os command injection

published 2026-09-14 55 d ago modified 2026-09-16 53 d ago also EUVD-2026-77356

cvss: 6.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

A vulnerability was determined in D-Link DWR-M921 1.1.52. This affects the function formsysCmd of the file /boafrm/formsysCmd of the component Boa Dispatch Table. Executing a manipulation of the argument sysCmd can lead to os command injection. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 53 d ago (2026-09-16)

Exploit prediction

2.32% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

gist.github.com https://gist.github.com/H3rmesk1t/42bca7c81530b8419811ddcbd39b3b56 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
CNA	3.1	6.6	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	6.6	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	6.6	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
CNA	2.0	5.8	AV:N/AC:L/Au:M/C:P/I:P/A:P

Affected products

D-Link DWR-M921

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

References

gist.github.com /H3rmesk1t/42bca7c81530b8419811ddcbd39b3b56
exploit
vuldb.com /vuln/403247
vdb-entry, technical-description
vuldb.com /vuln/403247/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-90705
third-party-advisory
vuldb.com /submit/917697
third-party-advisory
dlink.com /
product

Sources

CVE List CVE-2026-90705
NVD CVE-2026-90705

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary