CVE-2025-57740: Authenticated Heap Overflow in SSL-VPN bookmarks

Published Oct 14, 2025
·
Updated

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.

Other sources

An Heap-based Buffer Overflow vulnerability [CWE-122] in FortiOS, FortiPAM and FortiProxy RDP bookmark connection may allow an authenticated user to execute unauthorized code via crafted requests.

— FortiGuard

Affected Software

25 affected componentsFixes available
Fortinet FortiOS<=7.6.2, <=7.4.7, <=7.2.10, >=7.0, >=6.4
Fortinet FortiPAM<=1.5.0, <=1.4.2, >=1.3, >=1.2, >=1.1, >=1.0
Fortinet FortiProxy<=7.6.2, <=7.4.3, >=7.2, >=7.0
Fortinet FortiOS>=7.6.0<=7.6.2
Fortinet FortiOS>=7.4.0<=7.4.7
Fortinet FortiOS>=7.2.0<=7.2.10
Fortinet FortiOS>=7.0
Fortinet FortiOS>=6.4
Fortinet FortiPAM=.
Fortinet FortiPAM>=1.4.0<=1.4.2
Fortinet FortiPAM>=1.3
Fortinet FortiPAM>=1.2
Fortinet FortiPAM>=1.1
Fortinet FortiPAM>=1.0
Fortinet FortiProxy>=7.6.0<=7.6.2
Fortinet FortiProxy>=7.4.0<=7.4.3
Fortinet FortiProxy>=7.2
Fortinet FortiProxy>=7.0
Fortinet FortiProxy>=7.0.0<7.4.4
Fortinet FortiProxy>=7.6.0<7.6.3
Fortinet FortiPAM>=1.0.0<1.4.3
Fortinet FortiPAM=1.5.0
Fortinet FortiOS>=6.4.0<7.2.11
Fortinet FortiOS>=7.4.0<7.4.8
Fortinet FortiOS>=7.6.0<7.6.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.2.11
  2. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.4.8
  3. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.6.3
  4. Upgrade

    Upgrade FortiPAM to a version that resolves this vulnerability.

    Fixed in 1.4.3
  5. Upgrade

    Upgrade FortiPAM to a version that resolves this vulnerability.

    Fixed in 1.5.1
  6. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.4.4
  7. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.6.3
  8. Upgrade

    Upgrade FortiSASE-Sovereign to a version that resolves this vulnerability.

    Fixed in 25.2

Event History

Oct 14, 2025
Advisory Published
via FortiGuard·12:00 AM
Data Sourced
via FortiGuard·12:00 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·03:22 PM
Data Sourced
via MITRE·03:22 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Mar 3, 2026
Advisory Published
via FortiGuard·11:16 PM
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Frequently Asked Questions

1

What is the severity of CVE-2025-57740?

CVE-2025-57740 is classified as a high-severity vulnerability due to the potential for a heap-based buffer overflow.

2

How do I fix CVE-2025-57740?

To resolve CVE-2025-57740, upgrade to the latest versions of FortiOS, FortiPAM, or FortiProxy as specified in the vendor's advisory.

3

What versions are affected by CVE-2025-57740?

CVE-2025-57740 affects FortiOS versions 7.6.2 and below, FortiPAM versions 1.5.0 and below, among others listed in the vulnerability details.

4

Can CVE-2025-57740 lead to remote code execution?

Yes, CVE-2025-57740 can potentially allow remote code execution due to the nature of the heap-based buffer overflow.

5

Is there a public exploit available for CVE-2025-57740?

As of now, there are no confirmed public exploits for CVE-2025-57740, but organizations should still take precautionary measures.

Company

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