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FortiproxyApplication · Fortinet

CVE-2025-57740

HIGH · 8.8 CVSS v3.1 Published 2025-10-14
Fix available
A fix is available. Upgrade to 1.4.3 / 7.2.11 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An Heap-based Buffer Overflow vulnerability [CWE-122] in FortiOS version 7.6.2 and below, version 7.4.7 and below, version 7.2.10 and below, 7.0 all versions, 6.4 all versions; FortiPAM version 1.5.0, version 1.4.2 and below, 1.3 all versions, 1.2 all versions, 1.1 all versions, 1.0 all versions and FortiProxy version 7.6.2 and below, version 7.4.3 and below, 7.2 all versions, 7.0 all versions RDP bookmark connection may allow an authenticated user to execute unauthorized code via crafted requests.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A heap-based buffer overflow vulnerability (CWE-122) exists in the RDP bookmark connection functionality of FortiOS, FortiPAM, and FortiProxy. An authenticated user can exploit this vulnerability through crafted requests to execute unauthorized code remotely, potentially gaining full control of the affected device.

MitigationUpgrade FortiOS to version 7.4.8+, 7.2.11+, 7.6.3+ (or 7.0+/6.4+ to a supported version), FortiPAM to 1.4.3+/1.5.1+, and FortiProxy to 7.4.4+, 7.6.3+ (or 7.0-7.2 to a supported version). Apply principle of least privilege to RDP bookmark permissions and restrict network access to management interfaces.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FortiproxyApplication
Affected:>= 7.0.0, < 7.4.4>= 7.6.0, < 7.6.3
FortipamOperating system
Affected:>= 1.0.0, < 1.4.3= 1.5.0
FortiosOperating system
Affected:>= 6.4.0, < 7.2.11>= 7.4.0, < 7.4.8>= 7.6.0, < 7.6.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify product and installed version
    Access the Fortinet device CLI or GUI and run the command: 'get system status' (CLI) or check System > Settings > Firmware (GUI). Note the exact version number displayed.
    Affected if The product is FortiOS, FortiPAM, or FortiProxy and the version falls within these ranges: FortiOS >= 6.4.0 and < 7.2.11, or >= 7.4.0 and < 7.4.8, or >= 7.6.0 and < 7.6.3; FortiPAM >= 1.0.0 and < 1.4.3, or = 1.5.0; FortiProxy >= 7.0.0 and < 7.4.4, or >= 7.6.0 and < 7.6.3
  2. Verify RDP bookmark feature is in use
    In FortiOS/FortiProxy GUI, navigate to Policy & Objects > Proxy Settings > RDP Bookmarks (or 'execute vpn ssl web url-bookmark list' in CLI). In FortiPAM, check Remote Access > RDP Connections. Review whether any RDP bookmark entries are configured.
    Affected if RDP bookmarks are created, configured, or have been used in the proxy policy.
  3. Confirm administrator access exists
    Check user accounts with privileged access via 'show system admin' (CLI) or System > Administrators (GUI). Verify if accounts with sufficient privileges to create or modify RDP bookmarks exist.
    Affected if Authenticated administrators with permission to configure RDP bookmarks exist in the system.

The environment is affected if the installed FortiOS, FortiPAM, or FortiProxy version is within the affected ranges AND RDP bookmark functionality is accessible to authenticated users.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.4.3 / 7.2.11 / 7.4.4 or later
Fixed in 1.4.37.2.117.4.4
Interim mitigation

Upgrade FortiOS to version 7.4.8+, 7.2.11+, 7.6.3+ (or 7.0+/6.4+ to a supported version), FortiPAM to 1.4.3+/1.5.1+, and FortiProxy to 7.4.4+, 7.6.3+ (or 7.0-7.2 to a supported version). Apply principle of least privilege to RDP bookmark permissions and restrict network access to management interfaces.

Recommended fix High confidence

FortiOS: 7.2.11+, 7.4.8+, or 7.6.3+ | FortiPAM: 1.4.3+ | FortiProxy: 7.4.4+ or 7.6.3+

  1. 1. Identify the Fortinet product in use (FortiOS, FortiPAM, or FortiProxy) and current version via the web UI or CLI: `get system status`
  2. 2. For FortiOS: Upgrade to version 7.2.11 or later, 7.4.8 or later, or 7.6.3 or later depending on your branch
  3. 3. For FortiPAM: Upgrade to version 1.4.3 or later (version 1.5.0 is also affected)
  4. 4. For FortiProxy: Upgrade to version 7.4.4 or later or 7.6.3 or later depending on your branch
  5. 5. Download the appropriate firmware from Fortinet's support portal (fortinet.com/support)
  6. 6. Upload and install the firmware via the FortiOS/FortiPAM/FortiProxy web UI or CLI: `execute upgrade`
  7. 7. After upgrade, verify the new version is installed and the RDP bookmark functionality works as expected
  8. 8. Validate that the vulnerability is resolved by confirming the version is at or above the fixed release for your branch
Caveat Standard firmware upgrade risks apply - ensure backups of configuration are taken before upgrading and test in a staging environment if possible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Fortiproxy Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA3.0 h
16.0 hours of engineering $2,820
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-57740 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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