CVE-2026-4254CRITICAL 9.8EPSS p54.6%

CVE-2026-4254CVE-2026-4254

Description

A weakness has been identified in Tenda AC8 up to 16.03.50.11. This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.89% probability of exploitation · percentile 54.6% · 2026-06-18T12:00:27Z
Published2026-03-16
Last modified2026-03-20

Underlying weaknesses· 3

CWE-119CWE-121CWE-787

References

  1. https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md
  2. https://vuldb.com/?ctiid.351212
  3. https://vuldb.com/?id.351212
  4. https://vuldb.com/?submit.771773
  5. https://www.tenda.com.cn/

3

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live
WeaknessStack-based Buffer Overflowcwe-1210%live
WeaknessOut-of-bounds Writecwe-7870%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.