Security Resilience

CVE-2019-20500

Command Injection in Dlink Dwl-2600Ap Firmware ≤ 4.2.0.15

CISA KEVActive ExploitationEUVD ExploitedPublic PoCCommand Injection
Published
05 March 2020
Modified
07 November 2025
KEV Added
29 June 2023
Patch / advisory
View advisory
CVSS Score v3.1 7.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.97 99.9th percentile
Risk Priority 83 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2019-20500 is a high-severity OS Command Injection (CWE-78) vulnerability in Dlink Dwl-2600Ap Firmware. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 0.1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

D-Link DWL-2600AP devices running firmware version 4.2.0.15 Rev A contain an authenticated OS command injection vulnerability in the web interface's Save Configuration functionality. The flaw, tracked as CWE-78, allows shell metacharacters to be supplied in the configBackup or downloadServerip parameters of the admin.cgi?action=config_save endpoint, resulting in execution of arbitrary operating system commands.

An attacker who has obtained low-privileged authenticated access to the device can leverage the injection to run commands with high impact on confidentiality, integrity, and availability. The CVSS 3.1 base score of 7.8 reflects local attack vector, low attack complexity, and no user interaction requirements.

D-Link has issued a security advisory (SAP10113) that addresses the issue, and public exploit code demonstrating the vulnerability has been published. The CVE is also catalogued by CISA among known exploited vulnerabilities.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

D-Link DWL-2600AP 4.2.0.15 Rev A devices have an authenticated OS command injection vulnerability via the Save Configuration functionality in the Web interface, using shell metacharacters in the admin.cgi?action=config_save configBackup or downloadServerip parameter.

CWE(s)
CWE-78
KEV Date Added
29 June 2023

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
attack.mitre.org →
T1010 Application Window Discovery Discovery
Adversaries may attempt to get a listing of open application windows.
attack.mitre.org →
T1021.004 SSH Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
attack.mitre.org →
T1021.008 Direct Cloud VM Connections Lateral Movement
Adversaries may leverage [Valid Accounts](https://attack.
attack.mitre.org →
T1027.001 Binary Padding Stealth
Adversaries may use binary padding to add junk data and change the on-disk representation of malware.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2022-26258Same vendor: Dlinkboth on KEV
CVE-2016-11021Same vendor: Dlinkboth on KEV
CVE-2021-45382Same vendor: Dlinkboth on KEV
CVE-2020-9377Same vendor: Dlinkboth on KEV
CVE-2019-16920Same vendor: Dlinkboth on KEV
CVE-2019-17621Same vendor: Dlinkboth on KEV
CVE-2018-6530Same vendor: Dlinkboth on KEV
CVE-2019-16057Same vendor: Dlinkboth on KEV
CVE-2023-25280Same vendor: Dlinkboth on KEV
CVE-2020-25506Same vendor: Dlinkboth on KEV

Affected Assets

dlink
dwl-2600ap firmware
≤ 4.2.0.15

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
blocks

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
blocks

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References