November 14, 2026

CVE Watchtower

CVE-2026-129250Edimax BR6478ACV2 Classic Buffer Overflow

NVD

Vulnerability Summary

A security vulnerability has been detected in Edimax BR6478ACV2 1.23. The impacted element is the function formPPTPSetup of the file webs. The manipulation of the argument pptpUserName leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity Level
CRITICAL(9.4)
Published Date
Nov 14, 2026
Last Modified
Nov 14, 2026
Exploitation Status
Public exploit available
Root Weakness (CWE)
CWE-120: Classic Buffer Overflow β†—
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer β†—
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the intended boundary of the buffer.
CVSS v4.0 Base Metrics — Score 9.4 (CRITICAL)
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
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High
Show CVSS v3.x metrics (score 9.9)
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Edimax BR6478ACV2 1.23
Patched Versions
No patched version published yet
Until a fix ships, reduce exposure:
  • Restrict access to the affected service or interface to trusted networks.
  • Disable the affected feature if you do not need it.
  • Watch the vendor advisory for a firmware or software update.

What to do

Prioritize this fix. Exploit code is public, so attacks can follow quickly.

  1. Check whether you run Edimax BR6478ACV2 and which version.
  2. No patched version is listed yet. Limit access to the affected service to trusted networks, and disable the feature if you can.
  3. Subscribe to the vendor advisory so you learn when a fix ships.
  4. Review logs and exposed services for signs of earlier compromise.

Timeline

  • Nov 14, 2026Published
  • Nov 14, 2026Record last modified
  • Nov 14, 2026PoC status changed: POC to UNKNOWN
  • Nov 14, 2026CVSS score changed: 9.4 to 8.6
  • Nov 14, 2026Severity changed: CRITICAL to HIGH
  • Nov 14, 2026PoC status changed: POC to UNKNOWN
  • Nov 14, 2026CVSS score changed: 9.4 to 8.6
  • Nov 14, 2026Severity changed: CRITICAL to HIGH
  • Nov 14, 2026PoC status changed: POC to UNKNOWN
  • Nov 14, 2026CVSS score changed: 9.4 to 8.6
  • Nov 14, 2026Severity changed: CRITICAL to HIGH

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 13:06 UTC