Security readout for executives and security teams
Plain-English summary
A remotely reachable flaw in the D-Link DIR-825M firmware upgrade interface can corrupt device memory when a low-privileged user supplies a malicious firmware URL. Successful exploitation could compromise confidentiality, integrity, and availability. The evidence identifies firmware 1.1.8 only.
Executive priority
Treat confirmed DIR-825M 1.1.8 deployments as an urgent remediation priority, especially when management interfaces are externally reachable or accessible from untrusted networks. Prioritize exposure reduction immediately while confirming vendor guidance. Do not describe the issue as actively exploited without further evidence.
Technical view
The fota_url argument processed by sub_41802C in /boafrm/formLtefotaUpgradeFibocom can trigger a stack-based buffer overflow. CVSS 3.1 rates it 9.9, reflecting network access, low complexity, low privileges, no user interaction, changed scope, and high impact.
Likely exposure
Exposure is most likely where a DIR-825M running firmware 1.1.8 permits a low-privileged account to reach the LTE Module Firmware Upgrade handler. Internet exposure or access from untrusted networks increases risk. Other models and versions are not established by the supplied evidence.
Exploitation context
A public exploit report exists, so reproduction knowledge may be available. The supplied sources do not establish active exploitation, and the CVE is not identified as being in KEV. Authentication with low privileges is indicated by the CVSS vector.
Researcher notes
The record maps the issue to CWE-119 and CWE-121. Evidence names one handler, argument, model, and firmware version. Public exploit availability increases practical concern, but successful code execution, observed attacks, patch status, and applicability to other versions are not established by the supplied material.
Mitigation direction
- Inventory DIR-825M devices and identify those running firmware 1.1.8.
- Restrict management access to trusted administrators and isolated management networks.
- Remove the administration interface from direct internet exposure.
- Check D-Link guidance for corrected firmware or vendor-approved mitigation.
- If no safe remediation exists, consider replacing or isolating affected devices.
Validation and detection
- Confirm the exact device model and installed firmware through trusted administrative records.
- Review network controls governing access to the device administration interface.
- Verify low-privileged accounts cannot access firmware upgrade functions unnecessarily.
- Review logs for unexpected firmware-upgrade requests or changes.
- Confirm vendor guidance and remediation status without sending malformed input.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-82593 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
4 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P——VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810VulDBVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Base CVSS 3.1 score
9.9CriticalVector: 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
Base CVSS 3.0 score
9.9CriticalVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
9CriticalVector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- VDB-397088 | D-Link DIR-825M LTE Module Firmware Upgrade formLtefotaUpgradeFibocom sub_41802C stack-based overflowCVE reference, VulDB · vdb-entry, technical-description
- VDB-397088 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-82593 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #892516 | D-Link DIR-825M v1.1.8 Stack-based Buffer OverflowCVE reference, VulDB · third-party-advisory
- https://github.com/Robots10/IoT_vlu/blob/main/reports/Dlink/formLtefotaUpgradeFibocom/formLtefotaUpgradeFibocom.mdCVE reference, VulDB · exploit, patch
- https://www.dlink.com/CVE reference, VulDB · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.