Threats / Crestron / CVE-2019-3929
CVE-2019-3929
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Crestron Multiple Products vulnerability
Multiple Crestron products contain a command injection vulnerability in the file_transfer.cgi endpoint, allowing unauthenticated remote attackers to execute arbitrary OS commands with root privileges.
Verdict
Today item — known-exploited.
A critical remote code execution flaw affecting Crestron devices enables attackers to gain complete system control without authentication. The high EPSS score and active exploitation in the wild indicate immediate risk to deployed infrastructure.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
713 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-15).
Probability (EPSS)
EPSS 0.98952 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Crestron, Multiple Products. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-79 Cross-site Scripting (XSS) — weakness family: Web / client.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the file_transfer.cgi endpoint as exposed and unprotected on the target Crestron device.
Business
Attackers can discover vulnerable devices through network scanning, creating widespread exposure across customer deployments.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I craft a malicious HTTP request injecting shell commands into the file_transfer.cgi parameters.
Business
The lack of input validation allows arbitrary command execution, bypassing all authentication controls.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute commands with root-level privileges to install backdoors, exfiltrate data, or pivot to connected systems.
Business
Complete compromise of building automation, security systems, or AV infrastructure enables facility disruption or data theft.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05