CVE-2021-28840

HIGH
7.5
CVSS Score
Published: August 10, 2021 at 05:32 PM UTC
Updated: June 17, 2026 at 03:46 AM UTC
18 products affected across 1 vendorDap 2695 FirmwareDap 2660 FirmwareDap 2553 Firmware

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

Null Pointer Dereference vulnerability exists in D-Link DAP-2310 2.07.RC031, DAP-2330 1.07.RC028, DAP-2360 2.07.RC043, DAP-2553 3.06.RC027, DAP-2660 1.13.RC074, DAP-2690 3.16.RC100, DAP-2695 1.17.RC063, DAP-3320 1.01.RC014 and DAP-3662 1.01.RC022 in the upload_config function of sbin/httpd binary. When the binary handle the specific HTTP GET request, the content in upload_file variable is NULL in the upload_config function then the strncasecmp would take NULL as first argument, and incur the NULL pointer dereference vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

dlink-dap-2310 (same device)
dlink-dap-2330 (same device)
dlink-dap-2360 (same device)
dlink-dap-2553 (same device)
dlink-dap-2660 (same device)
dlink-dap-2690 (same device)
dlink-dap-2695 (same device)
dlink-dap-3320 (same device)
dlink-dap-3662 (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card