CVE-2026-21003

mediumpriority · track · 37EPSS 0.002 · 5 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.16% (5th) EPSS

CVSS 6.8 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

Improper input validation in data related to network restrictions prior to SMR Apr-2026 Release 1 allows physical attackers to bypass the restrictions.

cvss

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

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.3–6.8

v3.16.8mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.9 · impact 5.9

v4.05.2mediumCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.05.2mediumCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · mobile.security@samsung.com

v4.03.3lowCVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

George0Papasotiriou/CVE-2026-21003-JWT-none-Algorithm-Bypass-via-kid-Header-OmissionGeorge0Papasotiriou/CVE-2026-21003-JWT-none-Algorithm-Bypass-via-kid-Header-OmissionPoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

Samsung Android <SMR-APR-2026all versionscert_bundDE
Samsung Android< SMR-APR-2026cert_bundDE
Samsung Mobile Samsung Mobile Devices< SMR Apr-2026 Release in Selected Android 14, 15, 16 devicesenisa_euvdEU
samsung android= 14.0nvdUScpe:2.3:o:samsung:android:*:*:*:*:*:*:*:*
samsung android= 15.0nvdUScpe:2.3:o:samsung:android:*:*:*:*:*:*:*:*
samsung android= 16.0nvdUScpe:2.3:o:samsung:android:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0974Samsung Android: Mehrere SchwachstellenDeutsch2026-04-06csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Samsung Android ausnutzen, um seine Privilegien zu erhöhen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um Dateien zu manipulieren.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-04-13modified 2026-10-26

references (3)

External citations — patches, advisories, analysis.

scry

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