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CVE-2021-33265

35
FAUCET Score

CVE-2021-33265 is a critical stack buffer overflow vulnerability affecting D-Link DIR-809 devices with firmware up to DIR-809Ax_FW1.12WWB03_20190410. It can be triggered remotely by an unauthenticated attacker sending a crafted POST request, leading to complete compromise of the device (CVSS 9.8). While no public exploits or active exploitation have been observed, and community discussion is minimal, the high CVSS score and FAUCET Risk Score indicate a significant security risk.

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
13.72%
Probability of exploitation in next 30 days
EPSS Percentile
96.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1372 is in the 92nd percentile among its peer group of 36,835 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/vuln05
ExploitThird Party Advisory
dlink.com / en/security-bulletin
Vendor Advisory