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CVE-2021-27249

30
FAUCET Score

CVE-2021-27249 is a critical vulnerability affecting D-Link DAP-2020 v1.01rc001 Wi-Fi access points. It allows unauthenticated, network-adjacent attackers to execute arbitrary code with root privileges due to improper validation of user-supplied input within CGI scripts. This flaw has a CVSS score of 8.8 (High), indicating a severe risk with high impact on confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or social media discussions are currently identified, the vulnerability's nature makes it a significant threat.

Impacted Technologies

VendorProductVersion(s)CPE
1.01CPE matchmatch criteria
cpe:2.3:o:dlink:dap-2020_firmware:1.01:rc001:*:*:*:*:*:*

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
5.09%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0509 is in the 95th percentile among its peer group of 1,875 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
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-21-204
Third Party AdvisoryVDB Entry