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Full vulnerability report · 2021
CVE-2021-0646High confidence

In sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation

n/a · Android

7.8HighCVSS 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 sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege if the user can also inject a printf into a privileged process's SQL with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-153352319
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-2021-3265

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 sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege if the user can also inject a printf into a privileged process's SQL with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-153352319

What

In sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege if the user can also inject a printf into a privileged process's SQL with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-153352319

Why

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

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 sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege if the user can also inject a printf into a privileged process's SQL with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-153352319

Why

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

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 → Out-of-bounds Write → 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
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:L/AC:L/PR:L/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.

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.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
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-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-2021-0597 Référence CVE CVE-2021-0598 https://www.cve.org/CVERecord?id=CVE-2021-0598 Référence CVE CVE-2021-0599 https://www.cve.org/CVERecord?id=CVE-2021-0599 Référence CVE CVE-2021-0600 https://www.cve.org/CVERecord?id=CVE-2021-0600 Référence CVE CVE-2021-0601 https://www.cve.org/CVERecord?id=CVE-2021-0601 Référence CVE CVE-2021-0604 https://www.cve.org/CVERecord?id=CVE-2021-0604 Référence CVE CVE-2021-0640 https://www.cve.org/CVERecord?id=CVE-2021-0640 Référence CVE CVE-2021-0641 https://www.cve.org/CVERecord?id=CVE-2021-0641 Référence CVE CVE-2021-0642 https://www.cve.org/CVERecord?id=CVE-2021-0642 Référence CVE CVE-2021-0646 https://www.cve.org/CVERecord?id=CVE-2021-0646 Référence CVE CVE-2021-0650 https://www.cve.org/CVERecord?id=CVE-2021-0650 Référence CVE CVE-2021-0651 https://www.cve.org/CVERecord?id=CVE-2021-0651 Référence CVE CVE-2021-0652 https://www.cve.org/CVERecord?id=CVE-2021-0652 Référence CVE CVE-2021-0653 https://www.cve.org/CVERecord?id=CVE-2021-0653 Référence CVE CVE-2021-0682 https://www.cve.org/CVERecord?id=CVE-2021-0682 Référence CVE CVE-2021-0683 https://www.cve.org/CVERecord?id=CVE-2021-0683 Référence CVE CVE-2021-0684 https://www.cve.org/CVERecord?id=CVE-2021-0684 Référence CVE CVE-2021-0687 https://www.cve.org/CVERecord?id=CVE-2021-0687 Ré

Official advisory
CERT-FR · French · CERTFR-2021-AVI-590Multiples vulnérabilités dans Google Android

.cve.org/CVERecord?id=CVE-2021-0582 Référence CVE CVE-2021-0584 https://www.cve.org/CVERecord?id=CVE-2021-0584 Référence CVE CVE-2021-0591 https://www.cve.org/CVERecord?id=CVE-2021-0591 Référence CVE CVE-2021-0593 https://www.cve.org/CVERecord?id=CVE-2021-0593 Référence CVE CVE-2021-0639 https://www.cve.org/CVERecord?id=CVE-2021-0639 Référence CVE CVE-2021-0640 https://www.cve.org/CVERecord?id=CVE-2021-0640 Référence CVE CVE-2021-0641 https://www.cve.org/CVERecord?id=CVE-2021-0641 Référence CVE CVE-2021-0642 https://www.cve.org/CVERecord?id=CVE-2021-0642 Référence CVE CVE-2021-0645 https://www.cve.org/CVERecord?id=CVE-2021-0645 Référence CVE CVE-2021-0646 https://www.cve.org/CVERecord?id=CVE-2021-0646 Référence CVE CVE-2021-1904 https://www.cve.org/CVERecord?id=CVE-2021-1904 Référence CVE CVE-2021-1914 https://www.cve.org/CVERecord?id=CVE-2021-1914 Référence CVE CVE-2021-1916 https://www.cve.org/CVERecord?id=CVE-2021-1916 Référence CVE CVE-2021-1919 https://www.cve.org/CVERecord?id=CVE-2021-1919 Référence CVE CVE-2021-1920 https://www.cve.org/CVERecord?id=CVE-2021-1920 Référence CVE CVE-2021-1929 https://www.cve.org/CVERecord?id=CVE-2021-1929 Référence CVE CVE-2021-1930 https://www.cve.org/CVERecord?id=CVE-2021-1930 Référence CVE CVE-2021-1939 https://www.cve.org/CVERecord?id=CVE-2021-1939 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
No fixed version is explicitly recorded in the structured CVE data.
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 17 Aug 2021 · Last source change 3 Aug 2024, 15:47 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-2021-3265
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
ENISA EUVD · EUVD-2021-3265↗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-2021-0646 · cve.blacktree.nl