CVE-2023-28831

highpriority · track · 30EPSS 0.011 · 66 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.13% (66th) EPSS
CVSS 7.5 · high
Is it mine?
732 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-24

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

8.7
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Siemens ProductCERT DE
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · productcert@siemens.com DE
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-190USprimaryCWE-190USCWE-190USCWE-190US
05

affected products (732)

Products and version ranges known to be affected.

showing 20 of 732
06

advisories (5)

Vendor and ecosystem advisories describing this.

  • SSA-118850SSA-118850: Denial of Service Vulnerability in the OPC UA Implementation in SINUMERIK ONE and SINUMERIK MC2023-12-12csaf · siemens_psirtDE

    SINUMERIK ONE and SINUMERIK MC products are affected by a denial of service vulnerability in the OPC UA implementation of the integrated S7-1500 CPU. The vulnerability in the integrated S7-1500 CPU is documented in more detail in SSA-711309 [1]. Siemens has released updates for the affected products and recommends to update to the latest versions. [1] https://cert-portal.siemens.com/productcert/html/ssa-711309.html

  • SSA-711309SSA-711309: Denial of Service Vulnerability in the OPC UA Implementations of SIMATIC Products2023-09-12csaf · siemens_psirtDE

    The OPC UA implementations (ANSI C and C++) as used in several SIMATIC products contain a denial of service vulnerability that could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

  • WID-SEC-W-2023-2315Siemens SIMATIC S7: Schwachstelle ermöglicht Denial of ServiceDeutsch2023-09-12csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Siemens SIMATIC S7 ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • ICSA-23-257-01Siemens SIMATIC, SIPLUS Products2023-09-12icsa · cisa_csaf_otUS

    The OPC UA implementations (ANSI C and C++) as used in several SIMATIC products contain a denial of service vulnerability that could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

  • ICSA-23-348-06Siemens OPC UA Implementation in SINUMERIK ONE and SINUMERIK MC2023-12-12icsa · cisa_csaf_otUS

    SINUMERIK ONE and SINUMERIK MC products are affected by a denial of service vulnerability in the OPC UA implementation of the integrated S7-1500 CPU. The vulnerability in the integrated S7-1500 CPU is documented in more detail in SSA-711309 [1]. Siemens has released updates for the affected products and recommends to update to the latest versions. [1] https://cert-portal.siemens.com/productcert/html/ssa-711309.html

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtcert_bundNVDCVE.orgMITRE
published 2023-09-12modified 2026-06-17
10

references (15)

External citations — patches, advisories, analysis.

scry

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