High · CVSS 8.5CVE-2026-17250

Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update HandlingCVE-2026-17250

Answer in brief

CVE-2026-17250 records a High severity (CVSS 8.5) vulnerability in Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update Handling. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./TL-MR6400 v7.0 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 28, 2026Source checked Oct 6, 2026First seen by HOL Aug 21, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TP-Link Systems Inc./TL-MR6400 v7.0 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TP-Link Systems Inc./TL-MR6400 v7.0generic	>=0 <1.9.0 Build 260714	1.9.0 Build 260714, 1.9.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for TP-Link Systems Inc./TL-MR6400 v7.0.
Review the reported fix. Update TP-Link Systems Inc./TL-MR6400 v7.0 to 1.9.0 Build 260714 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source description

A stack-based buffer overflow vulnerability exists in the firmware update functionality of TL-MR6400 v7 due to unsafe processing of attacker-controlled metadata within a firmware image. Successful exploitation may allow an authenticated attacker to trigger memory corruption and execute arbitrary code on the affected device.

Quoted source text, attributed separately from HOL analysis.