Cyber Resilience

CVE-2019-20215

RCE in Dlink Dir-859 Firmware 1.05 … 1.06b01

Public PoCHigh EPSSRCECommand Injection
Published
29 January 2020
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.75 99.5th percentile
Risk Priority 97 floored blend · peak EPSS

Summary

CVE-2019-20215 is a critical-severity OS Command Injection (CWE-78) vulnerability in Dlink Dir-859 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via a urn: to the M-SEARCH method in ssdpcgi() in /htdocs/cgibin, because HTTP_ST is mishandled. The value of the urn: service/device is checked with the…

more

strstr function, which allows an attacker to concatenate arbitrary commands separated by shell metacharacters.

CWE(s)
CWE-78

Related Threats

Likely ATT&CK TechniquesAI

Techniques this vulnerability likely enables, inferred from its description, weakness type, and attributed-actor tradecraft. Confidence is per-technique.

T1190 Exploit Public-Facing Application Initial Accessconfidence: HIGH
The vulnerability allows remote attackers to execute arbitrary OS commands via a crafted M-SEARCH request to the UPnP/SSDP service.
attack.mitre.org →
T1059.004 Unix Shell Executionconfidence: HIGH
The flaw enables direct execution of arbitrary Unix shell commands through shell metacharacters injected into the HTTP_ST header.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2024-0769Same product: Dlink Dir-859
CVE-2023-36092Same product: Dlink Dir-859
CVE-2019-17621Same product: Dlink Dir-859
CVE-2024-48630Same vendor: Dlink
CVE-2023-50217Same vendor: Dlink
CVE-2024-33343Same vendor: Dlink
CVE-2024-5297Same vendor: Dlink
CVE-2024-48633Same vendor: Dlink
CVE-2023-44415Same vendor: Dlink
CVE-2023-34280Same vendor: Dlink

Affected Assets

dlink
dir-859 firmware
1.05, 1.06b01

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
  • V15.2.5

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
prevents

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
prevents

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.8.29 Security testing in development and acceptance mostly match
detects

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References