Security readout for executives and security teams
Plain-English summary
An unauthenticated remote attacker could take full control of an affected D-Link DWR-M961 router by sending malicious input to its app.cgi interface. Successful exploitation runs commands as root, potentially exposing traffic, changing configuration, disrupting connectivity, or using the router as an entry point into connected networks.
Executive priority
Prioritize immediate inventory and exposure reduction. Root command execution without authentication creates a credible risk of router takeover and downstream network impact. Accelerate vendor remediation for exposed devices, while recognizing that the supplied sources do not confirm active exploitation.
Technical view
CVE-2026-71956 is a CWE-78 command injection in the netDig.ping.dst field of app.cgi. The supplied record identifies DWR-M961 hardware C1 running software 1.1.2_C1_202602110044. CVSS 3.1 rates it 9.8 because exploitation is network-based, requires no privileges or user interaction, and can compromise confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely where the identified hardware and software combination is deployed and app.cgi is reachable from an untrusted network. The supplied evidence does not establish whether the interface is exposed by default, limited to local networks, or internet-facing in individual deployments.
Exploitation context
The technical conditions indicate low-complexity, unauthenticated network exploitation with root-level impact. However, the supplied bundle marks the CVE as absent from KEV and provides no cited evidence of active exploitation. Treat exploitation as technically serious, but do not characterize it as observed in the wild.
Researcher notes
The affected-version metadata contains an apparent inconsistency: the structured affected entry lists version "0," while the description names 1.1.2_C1_202602110044 on hardware C1. Validate scope against D-Link SAP10512 before making fleet-wide conclusions. The supplied evidence identifies the vulnerable field and privilege level but does not establish default reachability or exploitation telemetry.
Mitigation direction
- Inventory DWR-M961 devices and identify hardware revision and installed software version.
- Review SAP10512 and apply the vendor-provided patch or remediation exactly as directed.
- Restrict app.cgi and device administration access to trusted management networks.
- Prevent direct internet access to affected devices until vendor remediation is confirmed.
- Replace or isolate devices if supported remediation is unavailable.
Validation and detection
- Confirm each device reports hardware revision C1 and software version 1.1.2_C1_202602110044.
- Test whether app.cgi is reachable from internet, guest, user, or other untrusted network segments.
- Verify vendor remediation is installed using the version information specified in SAP10512.
- Review available device and network telemetry for unexpected app.cgi or netDig activity.
- After remediation, confirm management access remains restricted to authorized networks.
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-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 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-2026-71956 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
2 official scoresWe 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:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
- D-Link AdvisoryCVE reference, VulnCheck · vendor-advisory, patch
- Product WebpageCVE reference, VulnCheck · product
- https://www.vulncheck.com/advisories/d-link-dwr-m961-command-injection-via-app-cgiCVE reference, VulnCheck · third-party-advisory
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 an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.