Vulnerability · Published Aug 30, 2026 · Assigned by VulDB

CVE-2026-82593D-Link DIR-825M LTE Module Firmware Upgrade formLtefotaUpgradeFibocom sub_41802C stack-based overflow

Critical 9.9

In plain English

A critical-severity stack buffer overflow in DIR-825M from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.9%top 39.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in D-Link DIR-825M 1.1.8. This impacts the function sub_41802C of the file /boafrm/formLtefotaUpgradeFibocom of the component LTE Module Firmware Upgrade. This manipulation of the argument fota_url causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published and may be used.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DIR-825M	1.1.8

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-397088 | D-Link DIR-825M LTE Module Firmware Upgrade formLtefotaUpgradeFibocom sub_41802C stack-based overflow vdb-entry, technical-description
VDB-397088 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-82593 | CVE Analysis and Report third-party-advisory
Submit #892516 | D-Link DIR-825M v1.1.8 Stack-based Buffer Overflow third-party-advisory
https://github.com/Robots10/IoT_vlu/blob/main/reports/Dlink/formLtefotaUpgradeFibocom/formLtefotaUpgradeFibocom.md exploit, patch
https://www.dlink.com/ product