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CVE-2021-33268

31
FAUCET Score

CVE-2021-33268 is a critical stack buffer overflow vulnerability affecting D-Link DIR-809 devices with firmware up to version DIR-809Ax_FW1.12WWB03_20190410. This flaw can be triggered remotely by an unauthenticated attacker sending a specially crafted POST request to the /fromLogin function. With a CVSS score of 9.8, successful exploitation could lead to complete compromise of confidentiality, integrity, and availability of the affected device. Despite its high severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.12wwb03CPE matchmatch criteria
cpe:2.3:o:dlink:dir-809_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.94%
Probability of exploitation in next 30 days
EPSS Percentile
89.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0394 is in the 82nd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / Lnkvct/IoT-poc/tree/master/D-Link-DIR809/vuln03
ExploitThird Party Advisory
dlink.com / en/security-bulletin
Vendor Advisory