CriticalCVE-2019-3929

Crestron Multiple Products Command Injection Vulnerability (CVE-2019-3929)

Published 30.04.2019In CISA KEV since 15.04.2022Sources: CVE.org

What is affected, what to do

The vulnerability CVE-2019-3929 allows remote code execution (RCE) via command injection at the file_transfer.cgi HTTP endpoint in multiple Crestron products. An unauthenticated attacker can execute operating system commands as root. This vulnerability is actively exploited in the wild and is listed in the CISA KEV catalog. Affected products include Crestron AM-100, AM-101, Barco wePresent WiPG-1000P, among others. Immediate patching to the latest firmware versions is crucial to mitigate this security risk.

The vulnerability is being actively exploited; treat it as a priority. The available sources name no fixed version. Check the vendor guidance in the references below. Immediate actions, mitigation and detection rules are in the runbook below.

Affected: Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Crestron AM-100 firmware 1.6.0.2..Crestron AM-100 firmware 1.6.0.2
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Crestron AM-101 firmware 2.7.0.1..Crestron AM-101 firmware 2.7.0.1
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Barco wePresent WiPG-1000P firmware 2.3.0.10..Barco wePresent WiPG-1000P firmware 2.3.0.10
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Barco wePresent WiPG-1600W before firmware 2.4.1.19..Barco wePresent WiPG-1600W before firmware 2.4.1.19
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Extron ShareLink 200/250 firmware 2.0.3.4..Extron ShareLink 200/250 firmware 2.0.3.4
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Teq AV IT WIPS710 firmware 1.1.0.7..Teq AV IT WIPS710 firmware 1.1.0.7
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq SHARP PN-L703WA firmware 1.4.2.3..SHARP PN-L703WA firmware 1.4.2.3
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Optoma WPS-Pro firmware 1.0.0.5..Optoma WPS-Pro firmware 1.0.0.5
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq Blackbox HD WPS firmware 1.0.0.5..Blackbox HD WPS firmware 1.0.0.5
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq InFocus LiteShow3 firmware 1.0.16..InFocus LiteShow3 firmware 1.0.16
Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4. eq and InFocus LiteShow4 2.0.0.7..and InFocus LiteShow4 2.0.0.7

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Metrics

9.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

9.8

CVSS v3

Severity Critical on the scale from 0 to 10.

Source: CVE.org

99.0 %

EPSS score

High — model estimates ≥ 50% chance of real-world exploitation within 30 days.

Source: FIRST EPSS, percentile 99.93

Show all metrics

Severity: Critical
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 228.89 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: actively exploited
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 9.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 9.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 99.0 %; High — model estimates ≥ 50% chance of real-world exploitation within 30 days.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 99.93; Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: Actively exploited
Published: 30.04.2019
In CISA KEV since The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: 15.04.2022
CISA assessment (SSVC): Exploitation: active · automatable · Technical impact: total; Source: CISA Vulnrichment, as of 6 February 2025
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-79

Response and mitigation

Why act now?

Prioritisation rationale

This flaw is network-reachable without authentication, trivial to exploit and yields root directly. Public exploits have circulated for years, and it sits among the CVEs most likely to be exploited, with mass scanning and botnet recruitment keeping exposed units under constant pressure. For KRITIS and NIS2 organisations, the real risk is that these often-unmanaged boxes become an unmonitored foothold into the office network while carrying confidential meeting content. Treat internet-exposed units as an emergency. Patch or isolate internally reachable units on flat networks within days. CISA has not flagged ransomware use, but that lowers the priority only marginally.

01
Runbook step 1
Immediate response (0-24 h)
- Inventory wireless presentation gateways: Scan for affected models (e.g. nmap -p 80,443 --script http-title) and reconcile against the CMDB. In scope are Crestron AirMedia AM-100/AM-101, Barco wePresent WiPG-1000P/WiPG-1600W, Extron ShareLink 200/250, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS and InFocus LiteShow3/LiteShow4. These devices often live in meeting rooms, owned by facilities rather than IT.
- Remove internet exposure now: Block any internet-reachable web interface on these devices at the perimeter. Treat any externally exposed unit as potentially compromised, not merely vulnerable.
- Update firmware: For Barco wePresent WiPG-1600W, install firmware 2.4.1.19 or later. For all other models, a patch is available from the vendor — check the vendor advisory for the fixed version. Also confirm whether each model is still supported. Retire or strictly isolate end-of-life units that have no fix.
- Rebuild suspected-compromised units: Code runs as root, so patching alone is not enough. Factory-reset the device, reflash firmware from a trusted source, and reconfigure from scratch.
- Rotate credentials: Replace device admin passwords, any Wi-Fi PSKs or 802.1X credentials stored on the device, and SNMP communities where used.
02
Runbook step 2
Mitigation layers
- Network segmentation: Move AV and conferencing gear into a dedicated VLAN. Allow only presentation traffic from client networks. Restrict the web interface (/cgi-bin/, ports 80/443) to an admin jump-host subnet.
- Egress filtering: Default-deny internet egress from the AV VLAN, allowing only documented update servers. This blocks second-stage payload downloads (wget/tftp/curl) as well as botnet C2 and outbound scanning.
- IPS/WAF rule: Add a signature for HTTP requests to file_transfer.cgi that carry shell metacharacters. Suricata shape: alert http any any -> $AV_NET any (msg:"CVE-2019-3929 file_transfer.cgi cmd injection"; http.uri; content:"file_transfer.cgi"; pcre:"/(\x60|\$\(|;|\|)/P"; sid:...;). Enable any vendor IPS signatures for CVE-2019-3929.
- Configuration hardening: Disable services you don't need — the web UI if devices are centrally managed, plus SNMP and Telnet/SSH where present. Change all default passwords.
- Asset governance: Bring this device class into vulnerability management, with recurring scans and firmware lifecycle tracking. Add a procurement requirement for vendor update commitments.
03
Runbook step 3
Detection rules
- Network telemetry (Zeek http.log/Suricata): Look for requests whose uri contains file_transfer.cgi coming from outside the admin segment. Focus on POST bodies containing backticks, $(, ;, |, wget, tftp or busybox. KQL shape: CommonSecurityLog | where RequestURL has "file_transfer.cgi" | where RequestURL matches regex @"[\x60;|$]".
- Outbound from the AV VLAN: Alert in firewall or NetFlow data on new internet destinations, especially ELF binary downloads over HTTP, TFTP (UDP/69) or unusual high ports. A Zeek files.log match on mime_type == "application/x-executable" with a source in the AV subnet is a high-fidelity signal.
- Lateral or outbound scanning: AV devices opening Telnet (23/2323), SSH (22) or SMB (445) connections to many hosts fit the pattern of botnet propagation. A suitable Sigma correlation is "distinct dst_ip > 50 in 5 min, src in AV_NET".
- DNS anomalies: In resolver logs, flag lookups from the AV VLAN to newly registered, DGA-like or dynamic-DNS domains.
- Device integrity: Watch for unexpected reboots, config changes or unfamiliar files via syslog forwarding where the device supports it. Where it does not, network telemetry is your primary source.

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Actively exploited: treat the vulnerability as a priority in vulnerability handling under Art. 21(2)(e) NIS2. If it is exploited in your environment, check the reporting obligation under Art. 23 (early warning within 24 hours).
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: Since 11.09.2026, manufacturers of affected products with digital elements must report actively exploited vulnerabilities under Art. 14 CRA, with an early warning within 24 hours via ENISA's single reporting platform.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

The Crestron AM-100 firmware 1.6.0.2, Crestron AM-101 firmware 2.7.0.1, Barco wePresent WiPG-1000P firmware 2.3.0.10, Barco wePresent WiPG-1600W before firmware 2.4.1.19, Extron ShareLink 200/250 firmware 2.0.3.4, Teq AV IT WIPS710 firmware 1.1.0.7, SHARP PN-L703WA firmware 1.4.2.3, Optoma WPS-Pro firmware 1.0.0.5, Blackbox HD WPS firmware 1.0.0.5, InFocus LiteShow3 firmware 1.0.16, and InFocus LiteShow4 2.0.0.7 are vulnerable to command injection via the file_transfer.cgi HTTP endpoint. A remote, unauthenticated attacker can use this vulnerability to execute operating system commands as root.

Source: NVD (NIST), cvelistv5, CISA KEV Catalog

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Crestron	Crestron AirMedia, Barco WePresent, Extron ShareLink, Teq AV IT WIPS710, SHARP PN-L703WA, Optoma WPS-Pro, Blackbox HD WPS, InFocus LiteShow3, and InFocus LiteShow4.	`Optoma WPS-Pro firmware 1.0.0.5` `and InFocus LiteShow4 2.0.0.7` `Extron ShareLink 200/250 firmware 2.0.3.4` `Barco wePresent WiPG-1000P firmware 2.3.0.10` `Crestron AM-101 firmware 2.7.0.1` `Barco wePresent WiPG-1600W before firmware 2.4.1.19` `Blackbox HD WPS firmware 1.0.0.5` `Teq AV IT WIPS710 firmware 1.1.0.7` `SHARP PN-L703WA firmware 1.4.2.3` `Crestron AM-100 firmware 1.6.0.2` `InFocus LiteShow3 firmware 1.0.16`	— — — — — — — — — — —

Vendors and products

Affected operating systems

Affected operating systems

Other	crestron	am-100_firmware	`1.6.0.2`
Other	crestron	am-101_firmware	`2.7.0.2`
Other	blackbox	hd_wireless_presentation_system_firmware	`1.0.0.5`
Other	infocus	liteshow3_firmware	`1.0.16`
Other	infocus	liteshow4_firmware	`2.0.0.7`
Other	sharp	pn-l703wa_firmware	`1.4.2.3`
Other	extron	sharelink_200_firmware	`2.0.3.4`
Other	extron	sharelink_250_firmware	`2.0.3.4`
Other	barco	wepresent_wipg-1000p_firmware	`2.3.0.10`
Other	barco	wepresent_wipg-1600w_firmware	—
Other	teqavit	wips710_firmware	`1.1.0.7`
Other	optoma	wps-pro_firmware	`1.0.0.5`

Weakness classes (CWE)

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Base
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Entry at MITRE CWE-79

Public exploit references

Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

Public exploit references

CISA KEV Catalog	CISA Known Exploited Vulnerability (opens in a new tab)cisa.gov	actively exploited	15.04.2022
Packet Storm	Barco AWIND OEM Presentation Platform Unauthenticated Remote Command Injection (opens in a new tab)packetstormsecurity.com	PoC (publicly reported)reported, not verified	—
Packet Storm	Barco WePresent file_transfer.cgi Command Injection (opens in a new tab)packetstormsecurity.com	PoC (publicly reported)reported, not verified	—
Exploit-DB	EDB-ID 46786 (opens in a new tab)exploit-db.com	PoC (publicly reported)reported, not verified	—

References & sources

tenable.comsecurity/research/tra-2019-20x_refsource_MISC, Exploit, Third-party advisory
exploit-db.com46786Exploit, x_refsource_EXPLOIT-DB, Exploit, Third-party advisory, Vulnerability database
packetstormsecurity.comfiles/152715/Barco-AWIND-OEM-Presentation-Platform-Unauthentica…x_refsource_MISC, Third-party advisory, Vulnerability database
packetstormsecurity.comfiles/155948/Barco-WePresent-file_transfer.cgi-Command-Injectio…x_refsource_MISC, Third-party advisory, Vulnerability database
cisa.govknown-exploited-vulnerabilities-catalog?field_cve=CVE-2019-3929government-resource, US government resource

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What is affected, what to do

Metrics

Response and mitigation

Prioritisation rationale

Immediate response (0-24 h)

Mitigation layers

Detection rules

Detection rules

Classification under NIS2 and CRA

Description

Affected products

Vendors and products

Affected operating systems

Weakness classes (CWE)

Public exploit references

References & sources