Affects widely deployed FortiManager; high-severity remote RCE risk.
CVE-2025-54820
Remote unauthenticated buffer overflow enables command execution
Is CVE-2025-54820 being exploited?
Not confirmed. CVE-2025-54820 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.87% probability of exploitation in the next 30 days.
How severe is CVE-2025-54820?
CVE-2025-54820 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-54820?
Yes. A fix has been recorded for CVE-2025-54820. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-54820 affect?
CVE-2025-54820 affects FortiManager 7.4.0-7.4.2, FortiManager 7.2.0-7.2.10, FortiManager 6.4.x. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-54820?
Patch ASAP; verify updates on affected devices
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote RCE via crafted requests; attacker can run arbitrary commands on FortiManager when service enabled.
Immediate action required
- affected>= 7.4.0 and <= 7.4.2
- affected>= 7.2.0 and <= 7.2.10
- affected>= 6.4.0 and <= 6.4.15
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.