CVE Tools
Sign in

CVE-2021-23840

Integer overflow in CipherUpdate

Published: Feb 16, 2021Updated: Apr 16, 2026 Sources: CVE List NVD GHSA BDU csafCWE-190
7.5HIGH
NVD MITRE
EPSS Score
50.7%
Top 1.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

71 vulnerabilities in third-party components as Node.js, cURL, SQLite, CivetWeb and DNS(ISC BIND) could allow an attacker to interfere with the affected product in various ways. Siemens has released an update for SINEC INS and recommends to update to the latest versions.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

oracle
commercial·USaka oracle corp.
business intelligenceOn-premWeb App
Databases / data-warehouse-analytics
communications cloud native core policyOn-premDatabase
Databases / cache-message-queue
enterprise manager for storage managementOn-prem
Databases
enterprise manager ops centerOn-premWeb App
Databases / db-tooling
graalvmOn-premLibrary
OSS Libraries / generic-library
jd edwards enterpriseone toolsOn-premDatabase
Databases / relational
jd edwards world securityOn-prem
Enterprise Software
mysql serverOn-premDatabase
Databases / relational
fujitsu
commercial·JPaka m10-1 firmware, m10-4s firmware, m10-4 firmware
m10-1 firmware
Hardware Firmware
m10-4 firmware
Hardware Firmware
m10-4s firmware
Hardware Firmware
m12-1 firmware
Hardware Firmware
m12-2 firmware
Hardware Firmware
m12-2s firmware
Hardware Firmware
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Common EditionOn-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»On-premOS
Operating Systems / linux-distro
АО «НТЦ ИТ РОСА»
commercial·RU
ROSA VirtualizationOn-prem
Operating Systems / linux-distro
ROSA Virtualization 3.0On-prem
Operating Systems / linux-distro
tenable
commercial
log correlation engineOn-premSecurity Product
Security Products / siem-soar
nessus network monitorOn-premSecurity Product
Security Products / vuln-mgmt-scanner
crates.io
package-ecosystem
openssl-src
OSS Libraries
and 13 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-23840?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-389290.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/txt/ssa-389290.txt
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
cert-portal.siemens.com
and 126 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-23840 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows