CVE-2025-25249
A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions...
Affects 3 products across 3 vendors.
Buffer overflow corrupting dynamically allocated heap memory, exploitable for arbitrary code execution.
Software writes data past buffer boundaries, corrupting memory and potentially enabling code execution.
Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.
A heap-based buffer overflow vulnerability in multiple versions of Fortinet FortiOS and FortiSwitchManager allows an attacker to execute unauthorized code or commands via specially crafted packets. This vulnerability has a CVSS score of 9.8, indicating a critical severity level. Immediate action is required to mitigate the risk of exploitation.
BSID: BS-2026-GLOBAL-247236-C • Model: Qwen/Qwen2.5-72B-Instruct-AWQ • Confidence: HIGH
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| CVE ID | CVE-2025-25249 |
|---|---|
| BSID | BS-2026-GLOBAL-247236-C BreachSpider Global ID |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2026-01-13 |
| Last Modified | 2026-02-23 |
| ICS Relevance | 70% |
| Weakness (CWE) | |
| Verticals | |
| Domains | |
| Source | NVD |
A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows attacker to execute unauthorized code or commands via specially crafted packets
Source: NIST NVD / MITRE CVE Database
The vulnerability can be exploited remotely without authentication, requiring only network access to the affected device. An attacker can send specially crafted packets to trigger a heap-based buffer overflow, potentially leading to remote code execution.
Exploitation Likelihood: MEDIUM
| Vendor | Product | Fixed Version |
|---|---|---|
| Fortinet | Fortios | — |
| Fortinet | Fortiswitchmanager | — |
| Fortinet | Fortisase | — |
| Fujitsu-Siemens | — | — |
| Siemens | — | — |
| CISA KEV | Not in KEV catalog |
|---|---|
| Public Exploit | Not confirmed |
| PoC Code | Not confirmed |
Implement network segmentation and access controls to limit exposure to untrusted networks. Apply the latest security patches and updates from Fortinet as soon as they are available.
No reliable network detection signature exists for this vulnerability class — apply the compensating controls above and the vendor patch. SAGE only publishes a network rule when a concrete on-the-wire signature can be grounded in the advisory.
This vulnerability could allow an attacker to gain unauthorized access to critical systems, violating the requirement for secure access controls and the protection of critical cyber assets.
The vulnerability poses a significant risk to the integrity and availability of the control system, which is a key requirement under IEC 62443-4-2 for secure system design and implementation.
Virtual patch generated by CITED Relevance SAGE. Validate in isolated environment before production deployment. Compensating control only - does not replace vendor patch.
SAGE Enrichment Record — provenance & audit hash
| Model | Qwen/Qwen2.5-72B-Instruct-AWQ |
|---|---|
| Confidence | HIGH |
| Enriched At | 2026-05-24 |
| SHA-512 Audit Hash | bb76759a38b672919dba06167c6740f991ecb678602360f0bb501cda59f16398c46fa2ff683fa713b04aa4ba92dad03e5f75df707ba8330c1ba19d33b5589d62 |
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