Security readout for executives and security teams
Plain-English summary
This flaw can crash affected DrayTek routers when they process a crafted DHCP request. The main business risk is availability: internet access, remote offices, VPN connectivity, or branch routing could be disrupted if vulnerable devices are reachable by an attacker able to send such requests.
Executive priority
Treat as a high-priority availability risk for affected network appliances. It does not indicate data theft or code execution, but router crashes can disrupt business operations and remote connectivity.
Technical view
CVE-2024-41338 is a CWE-476 NULL pointer dereference in multiple DrayTek Vigor router families. The CVSS 3.1 score is 7.5, with network attack vector, low complexity, no privileges, no user interaction, and high availability impact only. Fixed-version thresholds are listed in the CVE description.
Likely exposure
Organizations using listed DrayTek Vigor models below the stated firmware versions may be exposed. Exposure depends on whether an attacker can deliver crafted DHCP requests to the vulnerable device. The bundle does not provide CPEs or detailed deployment conditions.
Exploitation context
The source bundle describes denial of service via crafted DHCP request. It does not cite active exploitation, public exploit use, or CISA KEV listing. KEV is false in the provided data.
Researcher notes
Evidence is sufficient for product-family and version triage from the CVE description, but incomplete for CPE mapping and real-world exploitation. Avoid exploit validation; focus on firmware comparison, network reachability, and availability telemetry.
Mitigation direction
- Upgrade affected DrayTek Vigor devices to the fixed firmware versions or later.
- Prioritize routers supporting branch connectivity, VPN, or internet edge functions.
- Check DrayTek and advisory guidance for model-specific update instructions.
- Limit untrusted ability to send DHCP traffic to affected devices where feasible.
- Monitor for unexpected router crashes, reboots, or service disruption.
Validation and detection
- Inventory DrayTek Vigor model numbers and current firmware versions.
- Compare firmware against every fixed-version threshold in the CVE description.
- Confirm no listed device remains below its fixed firmware version.
- Review availability monitoring for unexplained outages or router restarts.
- Document exceptions where updates cannot be applied immediately.
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-476: 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 lookupCVE-2024-41338 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/I:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946CVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.