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Full vulnerability report · 2021
CVE-2021-0474High confidence

In avrc_msg_cback of avrc_api.cc, there is a possible out of bounds write due to a heap buffer overflow

n/a · Android

9.8CriticalCVSS 3.1
Recommended action
Within 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

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 avrc_msg_cback of avrc_api.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-8.1 Android-9 Android-10Android ID: A-177611958
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-2021-3093

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 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available
01

What, why and how

In avrc_msg_cback of avrc_api.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-8.1 Android-9 Android-10Android ID: A-177611958

What

In avrc_msg_cback of avrc_api.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-8.1 Android-9 Android-10Android ID: A-177611958

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

In avrc_msg_cback of avrc_api.cc, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-8.1 Android-9 Android-10Android ID: A-177611958

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

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
a network path → Out-of-bounds Write → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
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-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

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

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.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
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code executionCWE-787
A

Official authority intelligence

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

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

.cve.org/CVERecord?id=CVE-2021-0434 Référence CVE CVE-2021-0435 https://www.cve.org/CVERecord?id=CVE-2021-0435 Référence CVE CVE-2021-0436 https://www.cve.org/CVERecord?id=CVE-2021-0436 Référence CVE CVE-2021-0437 https://www.cve.org/CVERecord?id=CVE-2021-0437 Référence CVE CVE-2021-0438 https://www.cve.org/CVERecord?id=CVE-2021-0438 Référence CVE CVE-2021-0443 https://www.cve.org/CVERecord?id=CVE-2021-0443 Référence CVE CVE-2021-0444 https://www.cve.org/CVERecord?id=CVE-2021-0444 Référence CVE CVE-2021-0471 https://www.cve.org/CVERecord?id=CVE-2021-0471 Référence CVE CVE-2021-0473 https://www.cve.org/CVERecord?id=CVE-2021-0473 Référence CVE CVE-2021-0474 https://www.cve.org/CVERecord?id=CVE-2021-0474 Référence CVE CVE-2021-0476 https://www.cve.org/CVERecord?id=CVE-2021-0476 Référence CVE CVE-2021-0478 https://www.cve.org/CVERecord?id=CVE-2021-0478 Référence CVE CVE-2021-0480 https://www.cve.org/CVERecord?id=CVE-2021-0480 Référence CVE CVE-2021-0481 https://www.cve.org/CVERecord?id=CVE-2021-0481 Référence CVE CVE-2021-0484 https://www.cve.org/CVERecord?id=CVE-2021-0484 Référence CVE CVE-2021-0506 https://www.cve.org/CVERecord?id=CVE-2021-0506 Référence CVE CVE-2021-0507 https://www.cve.org/CVERecord?id=CVE-2021-0507 Référence CVE CVE-2021-0508 https://www.cve.org/CVERecord?id=CVE-2021-0508 Ré

Official advisory
CERT-FR · French · CERTFR-2021-AVI-337Multiples vulnérabilités dans Google Android

g/CVERecord?id=CVE-2020-25656 Référence CVE CVE-2020-27786 https://www.cve.org/CVERecord?id=CVE-2020-27786 Référence CVE CVE-2020-27825 https://www.cve.org/CVERecord?id=CVE-2020-27825 Référence CVE CVE-2020-29661 https://www.cve.org/CVERecord?id=CVE-2020-29661 Référence CVE CVE-2021-0324 https://www.cve.org/CVERecord?id=CVE-2021-0324 Référence CVE CVE-2021-0466 https://www.cve.org/CVERecord?id=CVE-2021-0466 Référence CVE CVE-2021-0467 https://www.cve.org/CVERecord?id=CVE-2021-0467 Référence CVE CVE-2021-0472 https://www.cve.org/CVERecord?id=CVE-2021-0472 Référence CVE CVE-2021-0473 https://www.cve.org/CVERecord?id=CVE-2021-0473 Référence CVE CVE-2021-0474 https://www.cve.org/CVERecord?id=CVE-2021-0474 Référence CVE CVE-2021-0475 https://www.cve.org/CVERecord?id=CVE-2021-0475 Référence CVE CVE-2021-0476 https://www.cve.org/CVERecord?id=CVE-2021-0476 Référence CVE CVE-2021-0477 https://www.cve.org/CVERecord?id=CVE-2021-0477 Référence CVE CVE-2021-0480 https://www.cve.org/CVERecord?id=CVE-2021-0480 Référence CVE CVE-2021-0481 https://www.cve.org/CVERecord?id=CVE-2021-0481 Référence CVE CVE-2021-0482 https://www.cve.org/CVERecord?id=CVE-2021-0482 Référence CVE CVE-2021-0484 https://www.cve.org/CVERecord?id=CVE-2021-0484 Référence CVE CVE-2021-0485 https://www.cve.org/CVERecord?id=CVE-2021-0485 Ré

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. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 11 Jun 2021 · Last source change 3 Aug 2024, 15:40 UTC · CWE-787 · Out-of-bounds Write

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-2021-3093
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-2021-3093↗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-2021-0474 · cve.blacktree.nl