Buffer Overflow Vulnerability in D-Link DIR-825M LTE Module Firmware
CVE-2026-82593

9.4CRITICAL

Key Information:

Vendor

D-link
Status
Dir-825m
Vendor
CVE Published:
30 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82593?

A vulnerability has been identified in the D-Link DIR-825M router, specifically within the LTE Module Firmware Upgrade functionality. The issue lies in the manipulation of the fota_url parameter in the formLtefotaUpgradeFibocom, which can lead to a stack-based buffer overflow. This flaw allows for remote exploitation, potentially giving attackers the ability to execute arbitrary code on the affected device. Users should take immediate measures to secure their devices against this vulnerability to prevent unauthorized access and exploitation.

Affected Version(s)

DIR-825M 1.1.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82593 - Proof of Concept

References

https://vuldb.com/vuln/397088
vdb-entrytechnical-description
https://vuldb.com/vuln/397088/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82593
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

hacker128 (VulDB User)
.