CVE-2023-32649

highpriority · track · 30EPSS 0.006 · 51 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.64% (51st) EPSS
CVSS 7.5 · high
Is it mine?
17 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nozomi_psirt

EPSS · scored 2026-10-27

A Denial of Service (Dos) vulnerability in Nozomi Networks Guardian and CMC, due to improper input validation in certain fields used in the Asset Intelligence functionality of our IDS, allows an unauthenticated attacker to crash the IDS module by sending specially crafted malformed network packets. During the (limited) time window before the IDS module is automatically restarted, network traffic may not be analyzed.

01

remediations

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

A vendor fix is available.

  • FixedCMCnozomi_psirt

    Upgrade to v22.6.3, v23.1.0 or later.

  • FixedGuardiannozomi_psirt

    Upgrade to v22.6.3, v23.1.0 or later.

  • FixedRUGGEDCOM APE1808siemens_psirt

    Upgrade Nozomi Guardian / CMC to V23.4.1. Contact customer support to receive patch and update information.

  • FixedRUGGEDCOM APE1808cisa_csaf_ot

    Upgrade Nozomi Guardian / CMC to V23.4.1. Contact customer support to receive patch and update information.

  • MitigationCMCnozomi_psirt

    N/A. It is recommended to monitor the IDS log to check for abnormal stops and restarts.

  • MitigationGuardiannozomi_psirt

    N/A. It is recommended to monitor the IDS log to check for abnormal stops and restarts.

  • MitigationRUGGEDCOM APE1808siemens_psirt

    CVE-2023-32649: It is recommended to monitor the IDS log to check for abnormal stops and restarts

  • MitigationRUGGEDCOM APE1808cisa_csaf_ot

    CVE-2023-32649: It is recommended to monitor the IDS log to check for abnormal stops and restarts

02

cvss

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

8.2
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–8.2

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:H/E:P/RL:O/RC:Csecondary · CISA US
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Nozomi Networks PSIRT
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · prodsec@nozominetworks.comexploitability 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:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/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 · prodsec@nozominetworks.com
v4.04.6mediumCVSS:4.0/AV:N/AC:L/AT:P/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)
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-20USprimaryCWE-1286USCWE-1286USCWE-20USCWE-20US
05

affected products (17)

Products and version ranges known to be affected.

06

advisories (3)

Vendor and ecosystem advisories describing this.

  • NN-2023:10-01DoS on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.02023-09-18csaf · nozomi_psirtUS
  • SSA-292063SSA-292063: Multiple Vulnerabilities in Nozomi Guardian/CMC before 22.6.3 and 23.1.0 on RUGGEDCOM APE1808 devices2023-11-14csaf · siemens_psirtDE

    Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC before V22.6.3 and 23.1.0. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens is preparing updates and recommends specific countermeasures for products where updates are not, or not yet available. Customers are advised to consult and implement the workarounds provided in Nozomi Network's upstream security notifications.

  • ICSA-23-320-14Siemens RUGGEDCOM APE1808 Devices2023-11-14icsa · cisa_csaf_otUS

    Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC before V22.6.3 and 23.1.0. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens is preparing updates and recommends specific countermeasures for products where updates are not, or not yet available. Customers are advised to consult and implement the workarounds provided in Nozomi Network's upstream security notifications.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnozomi_psirtnvdsiemens_psirtNVDCVE.orgMITRE
published 2023-09-19modified 2026-06-17
10

references (5)

External citations — patches, advisories, analysis.

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