# CVE-2026-71408: CVE-2026-71408

Status: published. Published: 2026-08-12. Updated: 2026-11-10.

A allocation of resources without limits or throttling vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions may allow an unauthenticated attacker to perform a slow HTTP DoS attack on the web interface via crafted HTTP requests.

## Remediation

- fix: Upgrade to FortiOS version 8.0.0 or above
Upgrade to FortiOS version 7.6.7 or above (source: CNA: fortinet)

## Affected products and versions

- Fortinet / FortiOS: ≥ 7.6.0; ≤ 7.6.6 (affected, semver); ≥ 7.4.0; ≤ 7.4.13 (affected, semver); ≥ 7.2.0; ≤ 7.2.14 (affected, semver); ≥ 7.0.0; ≤ 7.0.19 (affected, semver); ≥ 6.4.0; ≤ 6.4.16 (affected, semver). Source: CNA: fortinet
- Siemens / RUGGEDCOM APE1808: ≥ 0; < * (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: fortinet

- CISA KEV: No listing in collected sources

- EPSS: 0.62% as of 2026-11-09; percentile 50.23%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-770

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://fortiguard.fortinet.com/psirt/FG-IR-26-162 (CNA: fortinet)

- https://cert-portal.siemens.com/productcert/html/ssa-127084.html (ADP: siemens-SADP)

## Provenance

- CNA: fortinet: https://www.cve.org/CVERecord?id=CVE-2026-71408; retrieved 2026-11-10; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-71408; retrieved 2026-11-10; source updated Not reported

Revision: 609a940854e585a59da915eb47b0c0031f5354f88c890e9681fb2e830dda3329

Canonical: https://y2.dev/cve/CVE-2026-71408

## Agent and API access

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- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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