CVE-2025-57740Network attack vector

Authenticated code execution via RDP bookmark overflow

Published Oct 14, 2025 · Updated Oct 14, 2025

Heap-based buffer overflow in Fortinet FortiOS, FortiPAM, and FortiProxy allows remote authenticated users to execute unauthorized code. Fortinet identifies the locus only as RDP bookmark connection processing and has not disclosed the request field or erroneous copy operation. Access to the affected bookmark feature and valid authentication are required; successful exploitation executes code on the appliance.

CVSS severity7.5
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Fortinet FortiOS, FortiPAM, and FortiProxy allows remote authenticated users to execute unauthorized code. Fortinet identifies the locus only as RDP bookmark connection processing and has not disclosed the request field or erroneous copy operation. Access to the affected bookmark feature and valid authentication are required; successful exploitation executes code on the appliance.

The record

CVE
CVE-2025-57740
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-122, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.0 <=6.4.16
  2. Affected versionversion=7.0.0 <=7.0.17
  3. Affected versionversion=7.2.0 <=7.2.10
  4. Affected versionversion=7.4.0 <=7.4.7
  5. Affected versionversion=7.6.0 <=7.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fortinet · FortiOSversion=6.4.0 <=6.4.16; version=7.0.0 <=7.0.17; version=7.2.0 <=7.2.10; version=7.4.0 <=7.4.7; version=7.6.0 <=7.6.2
Fortinet · FortiPAMversion=1.0.0 <=1.0.3; version=1.1.0 <=1.1.2; version=1.2.0; version=1.3.0 <=1.3.1; version=1.4.0 <=1.4.2; version=1.5.0
Fortinet · FortiProxyversion=7.0.0 <=7.0.21; version=7.2.0 <=7.2.15; version=7.4.0 <=7.4.3; version=7.6.0 <=7.6.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Fortinet, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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