Cyber Resilience

CVE-2020-8864

Dlink Dir-878 Firmware ≤ 1.20b03

High EPSS
Published
23 March 2020
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.80 99.6th percentile
Risk Priority 87 floored blend · peak EPSS

Summary

CVE-2020-8864 is a high-severity Incorrect Comparison (CWE-697) vulnerability in Dlink Dir-878 Firmware. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 0.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.10B04. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests.…

more

The issue results from the lack of proper handling of empty passwords. An attacker can leverage this vulnerability to execute arbitrary code on the router. Was ZDI-CAN-9471.

CWE(s)
CWE-697

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 unauthenticated network-adjacent attackers to bypass authentication via empty passwords in HNAP login requests on D-Link routers.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalationconfidence: HIGH
Successful exploitation grants arbitrary code execution on the router, enabling privilege escalation from the network-adjacent context.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2020-8863Same product: Dlink Dir-867
CVE-2024-48630Same product: Dlink Dir-878
CVE-2024-48633Same product: Dlink Dir-878
CVE-2024-48636Same product: Dlink Dir-878
CVE-2024-48634Same product: Dlink Dir-878
CVE-2024-48637Same product: Dlink Dir-878
CVE-2024-48631Same product: Dlink Dir-878
CVE-2024-48635Same product: Dlink Dir-878
CVE-2024-48629Same product: Dlink Dir-878
CVE-2024-48632Same product: Dlink Dir-878

Affected Assets

dlink
dir-878 firmware
≤ 1.20b03
dlink
dir-882 firmware
≤ 1.10b04
dlink
dir-867 firmware
≤ 1.10b04

Mitigating Controls

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

Secure development practices directly require correct logic for security comparisons and thereby prevent this class of flaw.

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 can detect incorrect comparison flaws before deployment.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes code review and testing that can catch incorrect comparison logic.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate correct comparison logic for security decisions.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles can require robust comparison mechanisms for access decisions.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly address avoiding incorrect comparison operators and logic.

A.8.5 Secure authentication partial match
degrades

Secure authentication mechanisms rely on correct comparison of credentials or tokens.

References