CVE-2025-53843

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-53843
StatePUBLISHED
Assignerfortinet
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-11-18 17:16:03 UTC
Updated2026-06-09 10:16:38 UTC
DescriptionA stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows attacker to execute unauthorized code or commands via specially crafted packets

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-121 | CWE-121 Execute unauthorized code or commands

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS6.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fortinet Fortios All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fortinet FortiOS affected 7.6.0 7.6.3 semver Not specified
CNA Fortinet FortiOS affected 7.4.0 7.4.8 semver Not specified
CNA Fortinet FortiOS affected 7.2.0 7.2.12 semver Not specified
CNA Fortinet FortiOS affected 7.0.0 7.0.18 semver Not specified
CNA Fortinet FortiOS affected 6.4.0 6.4.16 semver Not specified
ADP Siemens RUGGEDCOM APE1808 affected * custom Not specified

References

ReferenceSourceLinkTags
fortiguard.fortinet.com/psirt/FG-IR-25-358 [email protected] fortiguard.fortinet.com Vendor Advisory
cert-portal.siemens.com/productcert/html/ssa-864900.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Fortinet remediated this issue in FortiSASE version 25.3.c and hence customers do not need to perform any action. Fortinet remediated this issue in FortiEdgeCloud version 25.3 and hence customers do not need to perform any action. Upgrade to FortiSwitchManager version 7.2.7 or above Upgrade to FortiSwitchManager version 7.0.6 or above Upgrade to upcoming FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above

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