Fortinet
Fortinet Multiple Products Signature Verification Flaw Vulnerability
At a glance
Actively exploited in the wild — prioritise confirming exposure.
Medium rather than High: exposure is scored at a default because we cannot see your systems or suppliers. If you run or depend on Apple Multiple Products, treat it as High.
Briefing
- Do not treat uncorroborated claims as confirmed breaches.
Questions to ask IT
- Do we run Apple Multiple Products, and which versions?
- Is any of it reachable from the internet?
- Have we checked whether it has already been used against us?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 11 Nov?
Next steps
- Confirm exposure, mitigation status and any service interruption risk.
Vulnerability facts
Full CVE detail CVE-2025-59718- 9.8 · CriticalExploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Listed: attacks using it have been seen (on the catalogue since )
- Elevated attack likelihood (~68.3% in 30 days)
- 7.6.3 and earlier, 7.4.8 and earlier, 7.2.11 and earlier, 7.0.17 and earlier, 7.4.10 and earlier, 7.2.14 and earlier, 7.0.21 and earlier, 7.2.6 and earlier, 7.0.5 and earlier
These facts are for CVE-2025-59718. This event covers 1 more CVE, each with its own record.
No technical write-up beyond these facts and the summary below yet.
Next steps
- Confirm whether affected products/versions are present and prioritise patching or mitigations
Summary
- Please be aware that CVE-2025-59719 pertains to the same problem and is mentioned in the same vendor advisory. Ensure to apply all patches mentioned in the advisory.
- CVE-2025-59718 is listed in known-exploited catalogue (exploitation in the wild)
- Authoritative catalogues report active exploitation of this vulnerability.
Why this matters in the UK
- Known-exploited catalogue reports exploitation in the wild
Products and services involved
- Apple Multiple Products98% match confidence · CVE-2025-59718
Part of Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability
Pulse
Last checked 4d ago · Recheck overdue since 5 Nov 2026, 22:33 UK time · 2 quiet checks collapsed
in the next 30 days first recorded at 68.3% (elevated likelihood signal, not confirmed exploitation). Suggested changed to 7d.
Elevated — confirm exposure; this is a probability signal, not confirmed exploitation.
2 quiet checks hidden.
Sources
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ConfirmedHeadline90% confidence
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
- ConfirmedSummary fact75% confidence
Fortinet FortiOS, FortiSwitchMaster, FortiProxy, and FortiWeb contain an improper verification of cryptographic signature vulnerability that may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML message. Please be aware that CVE-2025-59719 pertains to the same problem and is mentioned in the same vendor advisory. Ensure to apply all patches mentioned in the advisory. Affects Fortinet Multiple Products. Known ransomware campaign use: Unknown.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2025-59718
- ConfirmedKnown-exploited catalogue98% confidence
CVE-2025-59718 is listed in known-exploited catalogue (exploitation in the wild)
- ConfirmedCVE identifier95% confidence
Event involves CVE-2025-59719