CVE-2026-26399

mediumpriority · track · 10EPSS 0.002 · 7 %ileexploit · PoCEU
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
1 exploit · PoC
Likely / severe?
0.18% (7th) EPSS
CVSS 5.3 · medium
Is it mine?
1 products
Check your exposure
Who says so?
2 sources
cnnvd · enisa_euvd

EPSS · scored 2026-10-27

A stack-use-after-return issue exists in the Arduino_Core_STM32 library prior to version 1.7.0. The pwm_start() function allocates a TIM_HandleTypeDef structure on the stack and passes its address to HAL initialization routines, where it is stored in a global timer handle registry. After the function returns, interrupt service routines may dereference this dangling pointer, resulting in memory corruption.

01

cvss

Technical severity, 0–10. One row per scoring source.

5.3
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU
v3.15.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondaryexploitability 1.8 · impact 3.4
v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:Psecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-562US
04

exploits (1)

Public proof-of-concept and weaponised exploit code.

05

affected products (1)

Products and version ranges known to be affected.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdNVDCVE.orgMITRE
published 2026-04-20modified 2026-06-17
08

references (7)

External citations — patches, advisories, analysis.

scry

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