Security readout for executives and security teams
Plain-English summary
CVE-2025-34043 is a critical remote command execution flaw in Vacron NVR v1.4. An unauthenticated attacker could send crafted HTTP requests to the device and run operating system commands as the web server process. For exposed video recorder systems, this could lead to device takeover, surveillance disruption, or a foothold into the network.
Executive priority
Treat this as urgent for any exposed Vacron NVR v1.4 deployment. The flaw requires no login and can allow remote command execution. Prioritize exposure reduction immediately while confirming vendor remediation options.
Technical view
The issue is improper input handling in the Vacron NVR v1.4 board.cgi script, mapped to CWE-20 and CWE-78. The CVSS 4.0 score is 10.0 with network attack vector, no privileges, no user interaction, and high impact across confidentiality, integrity, and availability for both vulnerable and subsequent systems.
Likely exposure
Highest concern is internet-facing Vacron NVR v1.4 devices or NVR management interfaces reachable from untrusted networks. The source bundle lists Vacron NVR v1.4 as affected and default status as unaffected for other versions, so do not generalize exposure without inventory evidence.
Exploitation context
The bundle states exploitation evidence was observed by Shadowserver on 2025-02-06 UTC, but KEV is false and no ongoing exploitation status is established here. Public references include technical descriptions and exploit-tagged third-party advisory material, increasing risk for exposed devices.
Researcher notes
Evidence is strong for the vulnerability class, affected version, and severity based on CVE metadata and multiple third-party references. Patch details are not provided in the bundle, so remediation should be tied to current Vacron guidance rather than assumed fixed versions.
Mitigation direction
- Inventory Vacron NVR devices and identify any running version 1.4.
- Check Vacron and trusted advisories for firmware updates or official remediation guidance.
- Remove NVR management interfaces from direct internet exposure.
- Restrict access to trusted admin networks or VPN-controlled management paths.
- Use available IDS/IPS signatures from trusted vendors where applicable.
- Monitor affected devices for suspicious web requests and unexpected process behavior.
Validation and detection
- Confirm whether any Vacron NVR v1.4 devices exist in asset inventory.
- Verify device management interfaces are not reachable from the public internet.
- Review vulnerability scanner findings from Tenable or equivalent authenticated checks.
- Inspect web logs for suspicious board.cgi requests without reproducing exploit behavior.
- Validate installed firmware against Vacron guidance and advisory references.
- Check network controls limiting access to NVR administration endpoints.
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-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCWE-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-2025-34043 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
- 10 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
10CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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.tenable.com/plugins/nessus/104124CVE reference, VulnCheck · third-party-advisory
- https://www.sonicwall.com/blog/vacron-network-video-recorder-remote-command-executionCVE reference, VulnCheck · third-party-advisory, signature
- https://ssd-disclosure.com/ssd-advisory-vacron-nvr-remote-command-execution/CVE reference, VulnCheck · third-party-advisory, exploit
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=30386CVE reference, VulnCheck · third-party-advisory
- https://vulncheck.com/advisories/vacron-nvr-remote-command-executionCVE reference, VulnCheck · third-party-advisory
- https://www.vacron.com/CVE reference, VulnCheck · product
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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
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.