CVE-2025-40899

highpriority · track · 0EPSS 0.003 · 20 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.29% (20th) EPSS
CVSS 8.9 · high
Is it mine?
10 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nozomi_psirt

EPSS · scored 2026-10-22

A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.

01

remediations

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

A vendor fix is available.

  • FixedCMCnozomi_psirt

    Upgrade to v26.0.0 or later.

  • FixedGuardiannozomi_psirt

    Upgrade to v26.0.0 or later.

  • FixedRUGGEDCOM APE1808siemens_psirt

    Upgrade Nozomi Guardian to v26.2.0. Contact customer support to receive patch and update information

  • FixedRUGGEDCOM APE1808cisa_csaf_ot

    Upgrade Nozomi Guardian to v26.2.0. Contact customer support to receive patch and update information

  • MitigationCMCnozomi_psirt

    Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones. Review existing custom fields.

  • MitigationGuardiannozomi_psirt

    Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones. Review existing custom fields.

02

cvss

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

8.9
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–8.9

v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:Hsecondary · prodsec@nozominetworks.comexploitability 2.3 · impact 6
v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:Hsecondary · CISA US
v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:Hsecondary · Siemens ProductCERT DE
v3.18.9highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:Hsecondary · Nozomi Networks PSIRT
v4.07.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:Lsecondary · ENISA EU
v4.07.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L/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
v4.04.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L/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: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79USCWE-79USCWE-79US
05

affected products (10)

Products and version ranges known to be affected.

06

advisories (3)

Vendor and ecosystem advisories describing this.

  • NN-2026:2-01Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.02026-04-15csaf · nozomi_psirtUS
  • SSA-827968SSA-827968: Vulnerability in Nozomi Guardian/CMC Before V26.2.0 on RUGGEDCOM APE1808 Devices2026-01-13csaf · siemens_psirtDE

    Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.

  • ICSA-26-015-07Siemens RUGGEDCOM APE1808 Devices2026-01-13icsa · cisa_csaf_otUS

    Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.

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_psirtsiemens_psirtNVDCVE.orgMITRE
published 2026-04-15modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

scry

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