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CVE-2026-17250

Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update Handling

HIGH
8.5
CVSS Score
Published: August 21, 2026 at 05:16 PM UTC
Updated: October 14, 2026 at 07:10 PM UTC
1 product affected across 1 vendorTL-MR6400

Using TL-MR6400 v7.0 by TP-Link Systems Inc.?

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Severity
HIGH8.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

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

TL-MR6400· TP-Link
90%
0 ≤ v < 1.9.0 Build 2607140
Affected range stops below 1.9.0 Build 260714, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

Patch and advisory references

References (3)

Patch
Source: cverecord
https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/tw/support/download/tl-mr6400/v7/#Firmware
Vendor Advisory
Source: cverecord
https://www.tp-link.com/us/support/faq/5259/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.5HIGHTPLink
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-121

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