Security readout for executives and security teams
Plain-English summary
CVE-2023-33782 is a high-severity command injection issue in the iperf3 diagnostics function of D-Link DIR-842V2 v1.0.3. An attacker with low-level privileges could potentially execute operating-system commands through the device’s diagnostic feature, affecting confidentiality, integrity, and availability.
Executive priority
Prioritize remediation where affected routers protect business networks or expose administration beyond trusted users. The issue has full CIA impact, but evidence provided does not prove active exploitation.
Technical view
The record describes CWE-77 command injection in D-Link DIR-842V2 firmware v1.0.3 via iperf3 diagnostics. CVSS 3.1 is 8.8: network attack vector, low complexity, low privileges required, no user interaction, and high impact across confidentiality, integrity, and availability.
Likely exposure
Organizations using D-Link DIR-842V2 devices on firmware v1.0.3 are the clearly indicated exposure group. The bundle does not provide authoritative CPEs, deployment prevalence, or whether remote management must be enabled.
Exploitation context
The source bundle includes a public GitHub reference, but does not cite CISA KEV listing or verified active exploitation. Treat public technical discussion as increasing research interest, not proof of in-the-wild exploitation.
Researcher notes
Affected metadata in the bundle is incomplete: vendor, product, versions, and CPEs are listed as n/a despite the description naming DIR-842V2 v1.0.3. Validate against vendor advisories before broad asset matching.
Mitigation direction
- Inventory D-Link DIR-842V2 devices and confirm firmware versions.
- Check D-Link security bulletin and vendor support channels for fixed firmware or guidance.
- Restrict router administration access to trusted management networks only.
- Disable unnecessary diagnostics or management features where supported.
- Replace or retire affected devices if no supported fix is available.
Validation and detection
- Confirm whether any DIR-842V2 device runs firmware v1.0.3.
- Review whether the iperf3 diagnostics function is enabled or reachable.
- Verify administrative interfaces are not exposed to untrusted networks.
- Check D-Link advisories for an applicable firmware update or workaround.
- Review device logs for unusual diagnostic or administrative activity.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-33782 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H2.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/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://www.dlink.com/en/security-bulletin/CVE reference, mitre
- https://github.com/s0tr/CVE-2023-33782CVE 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.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.