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Full vulnerability report · 2021
CVE-2021-0331High confidence

In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value

n/a · Android

7.3HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-770721 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-770721: Multiple Vulnerabilities in SIMATIC RF160B before V2.2
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC RF160B (6GT2003-0FA00)
Summary
In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-170731783
Remediation
Update to V2.2 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-2950

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-170731783

What

In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-170731783

Why

The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In onCreate of NotificationAccessConfirmationActivity.java, there is a possible overlay attack due to an insecure default value. This could lead to local escalation of privilege and notification access with User execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-170731783

Why

The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Improper Restriction of Rendered UI Layers or Frames → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-1021 ↗

CWE-1021: Improper Restriction of Rendered UI Layers or Frames. The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-1021
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2023-0360Google Android: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Google Android ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, einen Denial of Service Absturz herbeizuführen, seine Privilegien zu erhöhen oder unbekannte Auswirkungen zu verursachen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20210217Security Bulletin 17 Feb 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 17 Feb 2021, published on 17 February 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0203Multiples vulnérabilités dans les produits Siemens

cve.org/CVERecord?id=CVE-2020-29661 Référence CVE CVE-2021-0302 https://www.cve.org/CVERecord?id=CVE-2021-0302 Référence CVE CVE-2021-0305 https://www.cve.org/CVERecord?id=CVE-2021-0305 Référence CVE CVE-2021-0325 https://www.cve.org/CVERecord?id=CVE-2021-0325 Référence CVE CVE-2021-0326 https://www.cve.org/CVERecord?id=CVE-2021-0326 Référence CVE CVE-2021-0327 https://www.cve.org/CVERecord?id=CVE-2021-0327 Référence CVE CVE-2021-0328 https://www.cve.org/CVERecord?id=CVE-2021-0328 Référence CVE CVE-2021-0329 https://www.cve.org/CVERecord?id=CVE-2021-0329 Référence CVE CVE-2021-0330 https://www.cve.org/CVERecord?id=CVE-2021-0330 Référence CVE CVE-2021-0331 https://www.cve.org/CVERecord?id=CVE-2021-0331 Référence CVE CVE-2021-0333 https://www.cve.org/CVERecord?id=CVE-2021-0333 Référence CVE CVE-2021-0334 https://www.cve.org/CVERecord?id=CVE-2021-0334 Référence CVE CVE-2021-0336 https://www.cve.org/CVERecord?id=CVE-2021-0336 Référence CVE CVE-2021-0337 https://www.cve.org/CVERecord?id=CVE-2021-0337 Référence CVE CVE-2021-0339 https://www.cve.org/CVERecord?id=CVE-2021-0339 Référence CVE CVE-2021-0341 https://www.cve.org/CVERecord?id=CVE-2021-0341 Référence CVE CVE-2021-0390 https://www.cve.org/CVERecord?id=CVE-2021-0390 Référence CVE CVE-2021-0391 https://www.cve.org/CVERecord?id=CVE-2021-0391 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-071Multiples vulnérabilités dans Google Android

.cve.org/CVERecord?id=CVE-2021-0302 Référence CVE CVE-2021-0305 https://www.cve.org/CVERecord?id=CVE-2021-0305 Référence CVE CVE-2021-0314 https://www.cve.org/CVERecord?id=CVE-2021-0314 Référence CVE CVE-2021-0325 https://www.cve.org/CVERecord?id=CVE-2021-0325 Référence CVE CVE-2021-0326 https://www.cve.org/CVERecord?id=CVE-2021-0326 Référence CVE CVE-2021-0327 https://www.cve.org/CVERecord?id=CVE-2021-0327 Référence CVE CVE-2021-0328 https://www.cve.org/CVERecord?id=CVE-2021-0328 Référence CVE CVE-2021-0329 https://www.cve.org/CVERecord?id=CVE-2021-0329 Référence CVE CVE-2021-0330 https://www.cve.org/CVERecord?id=CVE-2021-0330 Référence CVE CVE-2021-0331 https://www.cve.org/CVERecord?id=CVE-2021-0331 Référence CVE CVE-2021-0332 https://www.cve.org/CVERecord?id=CVE-2021-0332 Référence CVE CVE-2021-0333 https://www.cve.org/CVERecord?id=CVE-2021-0333 Référence CVE CVE-2021-0334 https://www.cve.org/CVERecord?id=CVE-2021-0334 Référence CVE CVE-2021-0335 https://www.cve.org/CVERecord?id=CVE-2021-0335 Référence CVE CVE-2021-0336 https://www.cve.org/CVERecord?id=CVE-2021-0336 Référence CVE CVE-2021-0337 https://www.cve.org/CVERecord?id=CVE-2021-0337 Référence CVE CVE-2021-0338 https://www.cve.org/CVERecord?id=CVE-2021-0338 Référence CVE CVE-2021-0339 https://www.cve.org/CVERecord?id=CVE-2021-0339 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-003586Android におけるレンダリングされたユーザインターフェースレイヤまたはフレームの不適切な制限に関する脆弱性

Android には、レンダリングされたユーザインターフェースレイヤまたはフレームの不適切な制限に関する脆弱性が存在します。 本脆弱性は、Android ID: A-170731783 として公開されています。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
SIMATIC RF160B (6GT2003-0FA00)
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Update to V2.2 or later version
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 10 Feb 2021 · Last source change 3 Aug 2024, 15:39 UTC · CWE-1021 · Improper Restriction of Rendered UI Layers or Frames

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-2950
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-2950↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-0331 · cve.blacktree.nl