CVE-2023-28831
HIGH
7.5
CVSS Score
Published: September 12, 2023 at 09:32 AM UTC
Updated: June 17, 2026 at 05:48 AM UTC
182 products affected across 1 vendorSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSIMATIC S7-1500 CPU 1518F 4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware
Using SIMATIC BRAUMAT by Siemens?
Get instant alerts when new vulnerabilities affect SIMATIC BRAUMAT - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit
Description
The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.2v < V2.2
Affected range stops below 2.2, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.2, so it looks safe — our inference, not a vendor statement
siemens-simatic-cloud-connect-7-cc712 (same device)
v < 2.2v < V2.2
Affected range stops below 2.2, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.2, so it looks safe — our inference, not a vendor statement
siemens-simatic-cloud-connect-7-cc716 (same device)
Affected range stops below 2.2, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.9.7, so it looks safe — our inference, not a vendor statement
Affected range stops below V3.0.3, so it looks safe — our inference, not a vendor statement
siemens-simatic-drive-controller-cpu-1504d-tf (same device)
Affected range stops below 2.9.7, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.9.7, so it looks safe — our inference, not a vendor statement
Affected range stops below V3.0.3, so it looks safe — our inference, not a vendor statement
siemens-simatic-drive-controller-cpu-1507d-tf (same device)
v < 2.9.7
Affected range stops below 2.9.7, so it looks safe — our inference, not a vendor statement
siemens-simatic-et-200sp-open-controller-cpu (same device)
v < 3.0.3
Affected range stops below 3.0.3, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1200-cpu (same device)
v < 2.9.7
Affected range stops below 2.9.7, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1500-cpu-1510sp-1-pn (same device)
v < 3.0.3
Affected range stops below 3.0.3, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1500-cpu-1510sp-f-1-pn (same device)
v < 21.9.7v < V2.9.7v < V3.0.3
Affected range stops below 21.9.7, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.9.7, so it looks safe — our inference, not a vendor statement
Affected range stops below V3.0.3, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1500-cpu-1511-1-pn (same device)
v < 30.0.0v < V2.9.7
Affected range stops below 30.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.9.7, so it looks safe — our inference, not a vendor statement
siemens-simatic-s7-1500-cpu-1511c-1-pn (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
MitigationVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/html/ssa-118850.htmlMitigationVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/html/ssa-711309.htmlMitigationVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdfVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdfSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHsiemens
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-190
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card