HOMEVULNERABILITIESCVE-2020-15633
HIGH

CVE-2020-15633

CWE-288Published: July 23, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

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 1.20B10_BETA. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP requests. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router. Was ZDI-CAN-10835.

NVD Source

Technical Analysis

CVE-2020-15633 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

d-link3 product(s)
dir-867 firmwaredir-878 firmwaredir-882 firmware
dlink3 product(s)
dir-867dir-878dir-882
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-881/
ADVISORYhttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-881/

All References (4)

→
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-20-881/Third Party Advisory · VDB Entry
→
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-20-881/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2020-15633
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-288
CISA KEVNo
Affected2 vendor(s)
PublishedJul 23, 2020

Related CVEs (CWE-288)

CVE-2026-20079
10.0
CVE-2026-48020
10.0
CVE-2026-53622
10.0
CVE-2024-2973
10.0
CVE-2026-48491
10.0
CVE-2024-2013
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15633 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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