Security readout for executives and security teams
Plain-English summary
A hard-coded login secret may let an unauthenticated network attacker access and maliciously control an Epson EH-TW5350 projector using iProjection functionality. The cited record specifically names Epson iProjection.apk version 3.2.6; it does not establish whether other models or versions are affected.
Executive priority
Treat confirmed exposure as urgent because authentication can reportedly be bypassed without user involvement, enabling device control and potentially severe impact. Prioritize discovery and network containment immediately, then obtain Epson remediation guidance. Critical scoring supports urgency, but the incomplete affected-product and fix information requires careful validation.
Technical view
CVE-2021-43717 is classified as CWE-798: use of hard-coded credentials. The CVSS 3.1 score is 9.8 (critical), reflecting network reachability, low attack complexity, no required privileges or user interaction, and potentially high confidentiality, integrity, and availability impact.
Likely exposure
Likely exposure is limited to environments using the named EH-TW5350 and iProjection.apk 3.2.6 where an attacker can reach the projector. The supplied affected-product data is otherwise unspecified, with no CPEs, so broader exposure cannot be determined from these sources.
Exploitation context
The vulnerability could permit remote projector access and control using embedded authentication information. The source bundle does not identify a KEV listing or provide evidence of active exploitation. It also does not document observed campaigns, public weaponization, or prerequisites beyond identifying and reaching a compatible projector.
Researcher notes
The record presents an unusually broad CVSS impact assessment but limited technical and product metadata. The affected section lists no vendor, product, version, or CPE, while the title and description name EH-TW5350 and iProjection.apk 3.2.6. No patch, fixed version, or vendor advisory is identified in the supplied material.
Mitigation direction
- Inventory Epson EH-TW5350 projectors and systems using iProjection.apk 3.2.6.
- Restrict projector access to trusted management networks while remediation guidance is confirmed.
- Prevent untrusted or guest networks from reaching projector management interfaces.
- Check Epson guidance for supported updates, replacement software, or model-specific mitigations.
- Monitor projector access and configuration changes for unexpected activity.
Validation and detection
- Confirm each projector model and installed iProjection application version.
- Determine whether projector services are reachable from guest, wireless, or internet-facing networks.
- Review available projector and network logs for unexplained access or configuration changes.
- Verify segmentation rules prevent untrusted systems from reaching affected projectors.
- Confirm any vendor-recommended remediation is applied and remains effective after restart.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-43717 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/dpfkdlemtp/epson-eh-tw5350-advisories/blob/master/CVE-2021-43717.mdCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.