CVE-2025-59718

criticalpriority · act · 90OT risk · criticalKEV · exploitedEU KEV · CERT-ATEPSS 0.683 · 99 %ileexploit · PoCDEEUNLRUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV · 2 exploits · PoC
Likely / severe?
68.3% (99th) EPSS
CVSS 9.8 · critical
Is it mine?
67 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2025-12-16remediate by 2025-12-23

required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EU KEVflagged by CERT-ATreported 2026-01-27patched 2025-12-09

A improper verification of cryptographic signature vulnerability in Fortinet FortiOS, FortiProxy, FortiSwitchManager allows an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.

EPSS · scored 2026-10-22

Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability

A improper verification of cryptographic signature vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4.0 through 7.4.10, FortiProxy 7.2.0 through 7.2.14, FortiProxy 7.0.0 through 7.0.21, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.

01

remediations

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

A vendor fix is available.

  • FixedRUGGEDCOM APE1808siemens_psirt

    Update Fortigate NGFW to V7.4.9 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

  • FixedRUGGEDCOM APE1808cisa_csaf_ot

    Update Fortigate NGFW to V7.4.9 or later following the secure update recommendation procedure. Contact customer support to receive detailed information

  • MitigationRUGGEDCOM APE1808siemens_psirt

    To prevent being affected by this vulnerability on vulnerable versions, please turn off the FortiCloud login feature (if enabled, disabled by default) temporarily until upgrading to a non-affected version. (see https://fortiguard.fortinet.com/psirt/FG-IR-25-647 for more information)

  • MitigationRUGGEDCOM APE1808cisa_csaf_ot

    To prevent being affected by this vulnerability on vulnerable versions, please turn off the FortiCloud login feature (if enabled, disabled by default) temporarily until upgrading to a non-affected version. (see https://fortiguard.fortinet.com/psirt/FG-IR-25-647 for more information)

02

cvss

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

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · ENISA EU
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 3.9 · impact 5.9
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Siemens ProductCERT DE
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · NCSC-NL NL
03

ssvc

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

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USCWE-347USCWE-347USCWE-347USCWE-347US
05

exploits (2)

Public proof-of-concept and weaponised exploit code.

06

affected products (67)

Products and version ranges known to be affected.

showing 20 of 67
07

advisories (4)

Vendor and ecosystem advisories describing this.

  • NCSC-2025-0386Kwetsbaarheden verholpen in Fortinet productenNL2025-12-10csaf · ncsc_nlNL

    Fortinet heeft kwetsbaarheden verholpen in FortiOS, FortiProxy, FortiWeb en FortiSwitchManager.

  • SSA-864900SSA-864900: Multiple Vulnerabilities in Fortigate NGFW before V7.6.6 on RUGGEDCOM APE1808 Devices2025-05-13csaf · siemens_psirtDE

    Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.

  • WID-SEC-W-2025-2795Fortinet FortiOS, FortiProxy, FortiSwitch und FortiWeb: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2025-12-09csaf · cert_bundDE

    Ein Angreifer kann eine Schwachstelle in Fortinet FortiOS, Fortinet FortiProxy, Fortinet FortiSwitch und Fortinet FortiWeb ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

  • ICSA-25-135-01Siemens RUGGEDCOM APE1808 Devices2025-05-13icsa · cisa_csaf_otUS

    Fortinet has published information on vulnerabilities in FortiOS. This advisory lists the related Siemens Industrial products. Siemens is preparing fix versions and recommends to consult and implement the workarounds provided in Fortinet's upstream security notifications.

08

also known as (5)

Other names and identifiers for this entity.

09

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundncsc_nlsiemens_psirtcisa_csaf_otNVDCVE.orgMITRE
published 2025-12-09modified 2026-06-17
10

references (6)

External citations — patches, advisories, analysis.

scry

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