Live › vulnerability › CVE-2023-27997
Go to dashboardFortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow that lets an unauthenticated remote attacker send crafted requests and execute code or commands. CISA lists it as actively exploited in the wild, with ransomware use noted.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Fortinet FortiOS and FortiProxy SSL-VPN | vendor | – | – |
| fortinet fortiproxy | vendor | >= 1.1.0, <= 1.1.6 | – |
| fortinet fortiproxy | vendor | >= 1.2.0, <= 1.2.13 | – |
| fortinet fortiproxy | vendor | >= 2.0.0, <= 2.0.12 | – |
| fortinet fortiproxy | vendor | >= 7.0.0, <= 7.0.9 | – |
| fortinet fortiproxy | vendor | >= 7.2.0, <= 7.2.3 | – |
| fortinet fortios | vendor | >= 6.0.0, <= 6.0.16 | – |
| fortinet fortios | vendor | >= 6.2.0, <= 6.2.13 | – |
| fortinet fortios | vendor | >= 6.4.0, <= 6.4.12 | – |
| fortinet fortios | vendor | >= 7.0.0, <= 7.0.11 | – |
| fortinet fortios | vendor | >= 7.2.0, <= 7.2.4 | – |
| fortinet fortios | vendor | >= 6.0.12, <= 6.0.16 | – |
| fortinet fortios | vendor | >= 6.2.9, <= 6.2.13 | – |
| fortinet fortios | vendor | = 6.0.10 | – |
| fortinet fortios | vendor | = 6.2.4 | – |
| fortinet fortios | vendor | = 6.2.6 | – |
| fortinet fortios | vendor | = 6.2.7 | – |
| fortinet fortios | vendor | = 6.4.2 | – |
| fortinet fortios | vendor | = 6.4.6 | – |
| fortinet fortios | vendor | = 6.4.8 | – |
| fortinet fortios | vendor | = 6.4.10 | – |
| fortinet fortios | vendor | = 6.4.12 | – |
| fortinet fortios | vendor | = 7.0.5 | – |
| fortinet fortios | vendor | = 7.0.10 | – |
Unknown from the sources.
Apply the vendors updates for FortiOS and FortiProxy per Fortinets advisory; the fixed versions are not stated in the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.
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