Vulnerability report

Exploitation attempts observed in the wild Confirmed confidence In CISA KEV

CVE-2025-25249

FortiSwitchManager

Fortinet / FortiSwitchManager · affected before *

Watch CVE-2025-25249 Browse KEV feed
Severity
CVSS 7.4 · High
Confidence
Confirmed
Exploit status
Exploitation attempts observed in the wild
EPSS
3.7%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2025-25249 is an unauthenticated vulnerability affecting Fortinet FortiSwitchManager, FortiOS. A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8,...

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Fortinet / FortiSwitchManager affected before *.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

FortiSwitchManager

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

Siemens Affected
RUGGEDCOM APE1808
Before *
Fortinet Affected
FortiSwitchManager
Through 7.2.5
Fortinet Affected
FortiOS
Through 7.6.2 Through 7.4.7 Through 7.2.11
Published
13 Jan 2026
Exploitation Attempts Reported
08 Sep 2026
Attack vector
Remote
Complexity
High
Privileges
None
User interaction
None

Tags

ios edge cisa

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation attempts observed in the wild

SOCRadar

Recorded 08 Sep 2026

A trusted third party reported exploitation attempts.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
SOCRadar First 2026-09-08 15:03 UTC
CISA 2026-09-09 19:20 UTC
CVE 2026-09-09 20:01 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.4 High

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C

EPSS

3.7%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Heap-based Buffer Overflow CWE-122

Recent mention · SOCRadar

CVE-2025-25249 Exploitation Delivers PivotC2, a FortiGate Post-Exploitation RAT

CVE-2025-25249 Exploitation Delivers PivotC2, a FortiGate Post-Exploitation RAT One of the most common entry points for attackers is the exploitation of public-facing edge devices (such as VPNs, routers, and firewalls).

Read full advisory

Timeline

From disclosure to observed exploitation attempts

  1. 20:01 UTC

    KEV confirmed by CVE

    Exploitation attempts reported by an external source

  2. 19:20 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. 15:03 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party report of exploitation attempts

  4. 16:32 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 13:31 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2025-25249

Sample API response 
{
  "cve_id": "CVE-2025-25249",
  "confidence": "Confirmed",
  "cvss_score": 7.4,
  "cvss_estimated": false,
  "epss_score": 0.03742,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}