Critical severity · published Oct 5, 2026
CVE-2026-82989
There is an input injection in vCast exposed network services in ViewSonic ViewBoard that allows a remote, unauthenticated attacker to inject arbitrary input into service…
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
There is an input injection in vCast exposed network services in ViewSonic ViewBoard that allows a remote, unauthenticated attacker to inject arbitrary input into service endpoints via network-based HTTP requests to unauthenticated endpoints
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VC
vCast · Viewsonic
v0.0.0 through v3.2.715 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82989
blog.l3afs.space
https://blog.l3afs.space/posts/Vcast-Viewsonic-RCE-chain/
kb.cert.org
https://kb.cert.org/vuls/id/234131
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No description published yet