Medium severity · published Jul 14, 2026
CVE-2026-23573
An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4…
6.1
CVSS
0.4%
EPSS
No
On KEV
Description
An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiPAM 1.8.0, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.4.0 through 7.4.3, FortiProxy 7.2.0 through 7.2.9 may allow an authenticated remote user to execute code or commands via crafted requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiOS · Fortinet
7.6.0 through 7.6.6; 7.4.0 through 7.4.12; 7.2.0 through 7.2.13; 7.0.0 through 7.0.19; 6.4.0 through 6.4.16 · source: vendor, NVD
FO
FortiPAM · Fortinet
1.8.0; 1.7.0 through 1.7.2; 1.6.0 through 1.6.2; 1.5.0 through 1.5.1; 1.4.0 through 1.4.3; 1.3.0 through 1.3.1; +3 more · source: vendor, NVD
FO
FortiProxy · Fortinet
7.4.0 through 7.4.3; 7.2.0 through 7.2.9; 7.0.0 through 7.0.16 · source: vendor, NVD
RA
RUGGEDCOM APE1808 · Siemens
0 · source: CISA
In the news
VulnerabilityMedium
Siemens RUGGEDCOM APE1808
View CSAF
Summary
Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens recommends to contact customer support for additional information, and follow Fortinet advisory for workarounds and mitigation measures.
The following versions of Siemens RUGGEDCOM APE1808 are affected:
RUGGEDCOM APE1808 vers:all/* (CVE-2026-23573, CVE-2026-59839)
CVSS
Vendor
Equipment
Vulnerabilities
v3 6.1
Siemens
Siemens RUGGEDCOM APE1808
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Background
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
Vulnerabilities
Expand All +
CVE-2026-23573
An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiPAM 1.8.0, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.4.0 through 7.4.3, FortiProxy 7.2.0 through 7.2.9 may allow an ...
Aug 12, 2026·CISA Advisories
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23573
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23573
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-26-150
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-127084.html
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