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CVE-2020-8864

71
FAUCET Score

CVE-2020-8864 is a critical authentication bypass vulnerability affecting D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.10B04. This flaw, stemming from improper handling of empty passwords in HNAP login requests, allows network-adjacent attackers to bypass authentication without credentials. With a CVSS score of 8.8 (HIGH), successful exploitation can lead to arbitrary code execution on the router, posing a significant risk. While the vulnerability has a high EPSS score, indicating potential exploitability, there is currently no public exploit code (Metasploit, Nuclei, ExploitDB) and no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.20b03CPE matchmatch criteria
cpe:2.3:o:dlink:dir-878_firmware:*:*:*:*:*:*:*:*
<= 1.10b04CPE matchmatch criteria
cpe:2.3:o:dlink:dir-882_firmware:*:*:*:*:*:*:*:*
<= 1.10b04CPE matchmatch criteria
cpe:2.3:o:dlink:dir-867_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
80.22%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.8022 is in the 99th percentile among its peer group of 1,859 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

supportannouncement.us.dlink.com / announcement/publication.aspx
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-20-268
Third Party AdvisoryVDB Entry