Security readout for executives and security teams
Plain-English summary
CVE-2025-45931 is reported as a critical remote code execution issue in D-Link DIR-816-A2 firmware DIR-816A2_FWv1.10CNB05_R1B011D88210. A remote attacker could run arbitrary code through unsafe system() usage. The source bundle does not confirm exploitation in the wild or a vendor-fixed version.
Executive priority
Treat this as urgent for any organization using the named router firmware. The business risk is full device compromise, but prioritization depends on whether affected devices exist and are reachable. Start with inventory and vendor guidance rather than assuming a patch exists.
Technical view
The record describes CWE-77 command injection in the bin/goahead component, with CVSS 3.1 score 9.8 and network, low-complexity, unauthenticated attack characteristics. The affected metadata is incomplete, listing vendor/product/version as n/a, while the title and description name D-Link DIR-816-A2 firmware DIR-816A2_FWv1.10CNB05_R1B011D88210.
Likely exposure
Likely exposure is limited to environments running the named D-Link DIR-816-A2 firmware. Risk is highest where device management or vulnerable services are reachable from untrusted networks. The bundle does not provide CPEs, exact interface paths, or a definitive affected-version range.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source confirms active exploitation. The CVSS vector indicates remote, unauthenticated exploitation may be possible, but the bundle should not be treated as proof of public weaponization.
Researcher notes
Evidence quality is incomplete. The CVE record identifies a vulnerable firmware and component, but affected-product metadata is n/a and the bundle does not include patch status, detailed attack surface, or exploitation telemetry. Avoid broad product claims beyond the named DIR-816-A2 firmware build.
Mitigation direction
- Inventory D-Link DIR-816-A2 devices and record exact firmware versions.
- Check D-Link security bulletins for confirmed fixed firmware or retirement guidance.
- Restrict management access to trusted networks until vendor guidance is confirmed.
- Replace devices if no supported vendor fix is available.
- Monitor logs for unexpected administrative changes or outbound traffic.
Validation and detection
- Confirm whether any deployed device runs DIR-816A2_FWv1.10CNB05_R1B011D88210.
- Review external exposure for the router management or web service interfaces.
- Compare findings against D-Link’s security bulletin and advisory updates.
- Validate compensating controls without attempting exploit reproduction on production devices.
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-2025-45931 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://www.dlink.com/en/security-bulletin/CVE reference, mitre
- https://github.com/Synmac05/CVE-advisories/blob/main/CVE-2025-45931.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.
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.