Security readout for executives and security teams
Plain-English summary
This CVE is a critical remote code execution risk in multiple Vigor router models. A remote attacker can exploit how the device parses an HTTP POST Content-Length header, potentially taking control of the router. Business impact is highest where affected routers expose management HTTP services to untrusted networks.
Executive priority
Treat this as urgent for any internet-reachable affected router. Compromise of perimeter routers can enable traffic interception, outage, persistence, and follow-on access. Confirm exposure and update or isolate affected devices according to vendor guidance.
Technical view
CVE-2024-51139 is a CWE-120 buffer overflow in the CGI parser for HTTP POST Content-Length handling. The CVSS 3.1 score is 9.8, with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations using the named Vigor2620, LTE200, Vigor2860, 2925, 2862, 2926, 2133, 2762, 2832, 165, 166, 2135, 2765, 2766, 2865, 2866, 2927, 2962, 3910, or 3912 firmware lines may be exposed, especially if HTTP management is reachable from the internet.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked KEV in the bundle. The vulnerability is still high urgency because it is remotely reachable, unauthenticated, low complexity, and can allow arbitrary code execution on perimeter networking equipment.
Researcher notes
Evidence is limited to the CVE description and linked Faraday advisory URL in the bundle. The structured affected field is unhelpful, listing vendor and product as n/a, while the description names specific Vigor model and firmware families.
Mitigation direction
- Inventory all named Vigor models and record firmware versions.
- Consult vendor guidance for fixed firmware before making changes.
- Restrict router management HTTP access to trusted administrative networks.
- Disable internet-facing management where operationally possible.
- Prioritize remediation for externally reachable devices first.
Validation and detection
- Confirm whether deployed models match the CVE description.
- Compare installed firmware against the vulnerable version ceilings listed in the CVE.
- Check external exposure of router HTTP management interfaces.
- Review device and perimeter logs for unusual HTTP POST activity.
- Track remediation status by device, firmware, and exposure level.
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-120: 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 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-2024-51139 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://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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.