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CVE-2023-33781: An issue in D-Link DIR-842V2 v1.0.3 allows attackers to execute arbitrary commands via importing a crafted...

An issue in D-Link DIR-842V2 v1.0.3 allows attackers to execute arbitrary commands via importing a crafted file.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This CVE describes a high-impact command execution flaw in D-Link DIR-842V2 firmware v1.0.3. An authenticated attacker could import a crafted file and cause the router to run arbitrary commands. The source bundle does not name a vendor patch, affected version range beyond v1.0.3, or confirmed active exploitation.

Executive priority

Treat this as a high-priority edge-device risk if DIR-842V2 v1.0.3 exists in the environment. Prioritize inventory, management-plane restriction, and vendor guidance review before assuming a patch or broader product impact.

Technical view

The CVSS 3.1 vector is 8.8 high: network reachable, low complexity, low privileges, no user interaction, with high confidentiality, integrity, and availability impact. The stated trigger is importing a crafted file on D-Link DIR-842V2 v1.0.3. Public source details are sparse.

Likely exposure

Exposure is most likely where D-Link DIR-842V2 v1.0.3 devices are still deployed and the administrative import function is reachable by authenticated users, especially over untrusted networks or remote administration paths.

Exploitation context

The CVE is not listed as KEV in the supplied bundle, so active exploitation is not established here. The GitHub reference suggests public technical discussion exists, but this analysis does not rely on exploit details or provide weaponization guidance.

Researcher notes

The affected CPE data in the bundle is incomplete, while the CVE description names D-Link DIR-842V2 v1.0.3. Do not generalize to other models or versions without separate evidence. Patch status and vendor-specific remediation are not established in the provided sources.

Mitigation direction

  • Check D-Link security bulletins for firmware guidance for DIR-842V2 v1.0.3.
  • Restrict router administration to trusted management networks only.
  • Disable remote administration where it is not operationally required.
  • Use strong, unique administrator credentials and remove unused admin accounts.
  • Replace or isolate devices if no supported firmware path is available.

Validation and detection

  • Inventory D-Link DIR-842V2 devices and record firmware versions.
  • Confirm whether any device runs firmware v1.0.3.
  • Review whether administrative import functionality is reachable from untrusted networks.
  • Check firewall and router settings for remote administration exposure.
  • Track D-Link guidance and document remediation decisions.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2023-33781 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
3Timeline events
2ADP providers
3Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2023-33781Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.