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CVE-2021-34828

26
FAUCET Score

CVE-2021-34828 is a critical buffer overflow vulnerability affecting D-Link DAP-1330 1.13B01 BETA routers, specifically within the SOAPAction HTTP header handling. This flaw allows unauthenticated, network-adjacent attackers to execute arbitrary code on the device due to insufficient validation of user-supplied data length. With a CVSS score of 8.8 (HIGH), the vulnerability presents a significant risk, enabling complete compromise of confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for remote code execution without authentication makes it a serious concern for affected users.

Impacted Technologies

VendorProductVersion(s)CPE
1.13b01CPE matchmatch criteria
cpe:2.3:o:dlink:dap-1330_firmware:1.13b01:beta:*:*:*:*:*:*

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
2.33%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0233 is in the 90th 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

zerodayinitiative.com / advisories/ZDI-21-680
Third Party AdvisoryVDB Entry