Security readout for executives and security teams
Plain-English summary
This vulnerability lets an authenticated user run operating-system commands through the D-Link DWL-2600AP web interface. Because CISA lists it in KEV, exploitation is not theoretical. Treat exposed or still-managed devices as urgent until inventory, firmware status, and compensating controls are confirmed.
Executive priority
Prioritize this as high risk for any remaining affected access points. Known exploitation and command execution impact make it unsuitable to leave exposed while waiting for normal maintenance windows.
Technical view
CVE-2019-20500 is CWE-78 command injection in D-Link DWL-2600AP 4.2.0.15 Rev A. The described vector is Save Configuration in admin.cgi?action=config_save, using shell metacharacters in configBackup or downloadServerip. The CVSS 3.1 score is 7.8 with low privileges required and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where D-Link DWL-2600AP Rev A devices running firmware 4.2.0.15 are still deployed and their web administration interface is reachable by users with credentials.
Exploitation context
CISA KEV inclusion supports known exploitation. The source bundle also cites Exploit-DB, indicating public exploit information exists. The CVE description says authentication is required; the bundle does not prove unauthenticated exploitation.
Researcher notes
The bundle identifies the vulnerable function and parameters but does not include full advisory contents, patch version, or device lifecycle status. Avoid assuming unauthenticated reachability. Validate exposure through asset inventory, firmware checks, management-plane access review, and vendor advisory confirmation.
Mitigation direction
- Identify all D-Link DWL-2600AP Rev A devices and firmware versions.
- Review D-Link SAP10113 and apply vendor-recommended updates or replacement guidance.
- Restrict web administration access to trusted management networks only.
- Disable or decommission affected devices if vendor remediation is unavailable.
- Rotate administrative credentials if compromise is suspected.
Validation and detection
- Confirm whether any DWL-2600AP Rev A devices run firmware 4.2.0.15.
- Check whether admin web interfaces are reachable beyond management networks.
- Review logs for suspicious Save Configuration activity or unexpected configuration backups.
- Verify D-Link advisory status and document applied remediation.
- Track this CVE against CISA KEV remediation requirements.
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-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-2019-20500 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
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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.
CISA KEV status
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10113CVE reference · x_refsource_MISC
- https://www.exploit-db.com/exploits/46841CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-20500CVE reference · government-resource
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 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.