Security readout for executives and security teams
Plain-English summary
CVE-2020-10827 is a critical flaw in specific DrayTek routers that can let an unauthenticated remote attacker run code through an HTTP request. For executives, the concern is control of edge network devices, which can affect confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any affected DrayTek edge device. Prioritize internet-facing systems first because compromise could give attackers control over network infrastructure.
Technical view
The CVE describes a stack-based buffer overflow in apmd on DrayTek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1. It is reachable over the network via HTTP, requires no privileges or user interaction, and has CVSS 3.1 score 9.8.
Likely exposure
Organizations using DrayTek Vigor3900, Vigor2960, or Vigor300B devices running firmware before 1.5.1 are potentially exposed, especially where HTTP access is reachable from untrusted networks.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is still high-risk because it is remotely reachable, unauthenticated, and can allow code execution on network edge equipment.
Researcher notes
The bundle identifies apmd and HTTP request handling but does not provide safe implementation details, CPEs, or confirmed exploitation. Avoid assuming broader DrayTek impact beyond the named models and firmware condition.
Mitigation direction
- Upgrade affected devices to firmware 1.5.1 or later vendor-recommended firmware.
- Restrict HTTP management access to trusted administrative networks only.
- Remove internet exposure for affected device management interfaces.
- Review DrayTek’s advisory before applying operational changes.
- Replace unsupported devices if current fixed firmware is unavailable.
Validation and detection
- Inventory Vigor3900, Vigor2960, and Vigor300B devices.
- Verify firmware versions and flag anything before 1.5.1.
- Check whether HTTP management is reachable externally.
- Review perimeter scans for exposed DrayTek management services.
- Confirm remediation by rechecking firmware and management exposure.
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-787: 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-2020-10827 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.
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:H3.95.9Primary CVE scoreVulnerability 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
Source materials
- CVE List V5 sourceCVE List V5
- https://slashd.ga/2020/03/draytek-vulnerabilities/CVE reference · x_refsource_MISC
- https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability/CVE reference · x_refsource_CONFIRM
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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.