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CVE-2020-15633

22
FAUCET Score

CVE-2020-15633 is a high-severity authentication bypass vulnerability affecting D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.20B10_BETA. This flaw, stemming from incorrect string matching in HNAP request handling, allows network-adjacent attackers to bypass authentication without user interaction. Successful exploitation can lead to privilege escalation and arbitrary code execution on the router, posing a significant risk with a CVSS score of 8.8. While no public exploits (Metasploit, Nuclei, ExploitDB) are currently available and it is not listed in CISA's KEV catalog, the vulnerability has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.20b10CPE matchmatch criteria
cpe:2.3:o:d-link:dir-867_firmware:*:*:*:*:*:*:*:*
<= 1.20b05CPE matchmatch criteria
cpe:2.3:o:d-link:dir-878_firmware:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:d-link:dir-882_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
2.77%
Probability of exploitation in next 30 days
EPSS Percentile
84.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0277 is in the 91st percentile among its peer group of 1,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

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-20-881
Third Party AdvisoryVDB Entry