No exploitation reportedFix available

CVE-2021-27250

No exploitation reported by the sources we read.

Published2021-04-14
WeaknessCWE-73

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link DAP-2020 v1.01rc001 Wi-Fi access points. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of CGI scripts. When parsing the errorpage request parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-11856.

Timeline

dates in UTC

2021-04-1416:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-27250?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27250?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Dlink dap-2020 firmwareversion to verify

Branch	Affected	Fixed in	Source
1.1	= 1.01	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

supportannouncement.us.dlink.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.16.5read 2026-10-23
CNACVSS 3.06.5read 2026-10-23
NVDCVSS 2.03.3read 2026-10-23
CNAweakness (CWE)CWE-73read 2026-10-23
FIRST EPSSEPSS score67.4 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2021-04-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-27250?

Is CVE-2021-27250 actively exploited?

Active exploitation of CVE-2021-27250 has not been confirmed. Its EPSS score was 67.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27250?

CVE-2021-27250 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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