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CVE Record

CVE-2026-82690: D-Link DNS-327L/DNS-340L ve_mgr.cgi os command injection

A flaw has been found in D-Link DNS-327L and DNS-340L up to 20260717. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/ve_mgr.cgi. This manipulation of the argument f_dev causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used.

CriticalCVSS 9.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A command-injection flaw in D-Link DNS-327L and DNS-340L network storage devices could let a remote, highly privileged user run operating-system commands. Successful compromise could expose, alter, or disrupt device data and services. Public exploit material exists, but the supplied sources do not establish active exploitation.

Executive priority

Treat affected, reachable devices as an immediate remediation priority because compromise could affect stored data and connected systems. Public exploit availability raises urgency, but high privileges are reportedly required. Restrict access now, verify vendor guidance, and replace unsupported units when a confirmed fix is unavailable.

Technical view

The reported flaw affects the f_dev argument handled by /cgi-bin/ve_mgr.cgi. Insufficient command sanitization can permit OS command injection over the network without user interaction, although CVSS indicates high privileges are required. The supplied record reports affected builds through 20260717 and assigns CVSS 4.0 score 9.4, with high impacts across both systems.

Likely exposure

Exposure is most likely where affected DNS-327L or DNS-340L management interfaces are network-accessible and privileged credentials can be obtained or abused. Internet exposure, weak credential controls, or untrusted administrative access would increase risk. The source bundle does not clarify default configuration, exact authentication mechanics, or deployment prevalence.

Exploitation context

Public exploit material is referenced, and CVSS marks exploit maturity as proof-of-concept. Remote access, low attack complexity, no user interaction, and high privileges are reported. However, KEV is false in the supplied bundle, and no cited source confirms exploitation in real-world attacks.

Researcher notes

Evidence identifies CWE-77/CWE-78 command injection in f_dev at ve_mgr.cgi. Important unknowns include authentication details, exact affected firmware mapping, vendor patch status, and whether the dated build notation applies identically to both models. Public exploit publication supports elevated risk, not confirmed operational exploitation.

Mitigation direction

  • Identify affected DNS-327L and DNS-340L devices and restrict their management interfaces to trusted administrative networks.
  • Block internet access to the affected CGI management endpoint and enforce strong, unique administrator credentials.
  • Check D-Link guidance for confirmed fixed firmware, mitigations, or product retirement instructions.
  • Isolate unsupported devices and prioritize replacement if no vendor-supported remediation is available.
  • Monitor management access and device activity for unexpected commands, configuration changes, or outbound connections.

Validation and detection

  • Inventory device models and record installed firmware or build identifiers.
  • Confirm whether /cgi-bin/ve_mgr.cgi is reachable from untrusted or internet-facing networks.
  • Review administrative accounts, authentication logs, and recent management-interface access.
  • Compare installed builds with D-Link guidance and the reported affected range through 20260717.
  • Inspect logs and configuration for unexplained changes without attempting command-injection testing on production devices.
Prepared
Confidence
medium
Sources
8

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.

cwe · medium confidence lookup

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 lookup
cwe · medium confidence lookup

CWE-78: 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 lookup
description · low confidence lookup

Execution 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 lookup
cve · low confidence lookup

CVE-2026-82690 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.4 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

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.

4CVSS vectors
6Timeline events
1ADP providers
7Source links

SSVC decision data

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

CVSS vector scores

4 official scores

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
9.4CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P——VulDB
9.1CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R2.36VulDB
9.1CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R2.36VulDB
8.3CVSS 2.0HighAV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR6.410VulDB

Vulnerability scoring details

Base CVSS 4.0 score

9.4Critical
CVSS 4.0 vector shape for CVE-2026-82690Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

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

  1. Source timelineVulDB

    Advisory disclosed

  2. Source timelineVulDB

    VulDB entry created

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timelineVulDB

    VulDB entry last update

  5. CVE publishedCVE Program

    The CVE record was published.

  6. CVE updatedCVE Program

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
D-LinkDNS-327L20260717Listed
D-LinkDNS-340L20260717Listed
Weakness

CWE details

CWE-77CWE-78

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