CVE-2025-64155

Description

An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.1.0 through 7.1.8, FortiSIEM 7.0.0 through 7.0.4, FortiSIEM 6.7.0 through 6.7.10 may allow an attacker to execute unauthorized code or commands via crafted TCP requests.

Overview

State: PUBLISHED
Assigner (CNA): fortinet
CVSS severity: CRITICAL
CVSS score: 9.4 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
Effective score: 9.4 / 10 CRITICAL source: CNA overview
CWE(s): CWE-78
Reserved: 2025-10-28
Published: 2026-01-13 17:32 UTC
Last updated: 2026-02-26 16:04 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/64xxx/CVE-2025-64155.json
Linked Threat: CVE-2025-64155 — CVE-2025-64155

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-01-13 17:15:58 UTC
NVD last modified: 2026-01-20 16:16:06 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: psirt@fortinet.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0008 (probability of exploitation in next 30 days)
EPSS percentile: 23.21% vs all CVEs — higher = more likely to be exploited, as of 2026-05-25

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-2076
Assigner: fortinet
Published: Jan 13, 2026, 4:32:28 PM
Updated: Feb 26, 2026, 3:04:42 PM
EUVD base score (CVSS 3.1): 9.4 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
EUVD-reported EPSS: 0.0800
Vendors: Fortinet
Products: FortiSIEM (7.3.0 ≤7.3.4)

FortiSIEM (7.2.6)

FortiSIEM (7.1.8)

FortiSIEM (7.0.4)

FortiSIEM (6.7.10)

FortiSIEM (7.4.0)
Aliases: GHSA-gvhh-fvm4-vqqj

ENISA description: An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.1.0 through 7.1.8, FortiSIEM 7.0.0 through 7.0.4, FortiSIEM 6.7.0 through 6.7.10 may allow an attacker to execute unauthorized code or commands via crafted TCP requests.

EUVD references (1)

https://fortiguard.fortinet.com/psirt/FG-IR-25-772

Affected products (1)

Vendor	Product	Versions	Platforms
Fortinet	FortiSIEM	`7.4.0` (affected), `7.3.0` (affected), `7.2.6` (affected), `7.1.8` (affected), `7.0.4` (affected), `6.7.10` (affected)	—

Affected products — CPE 2.3 (2) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:7.4.0:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://fortiguard.fortinet.com/psirt/FG-IR-25-772

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://fortiguard.fortinet.com/psirt/FG-IR-25-772

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (3)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://fortiguard.fortinet.com/psirt/FG-IR-25-772 psirt@fortinet.com Vendor Advisory
https://github.com/horizon3ai/CVE-2025-64155 134c704f-9b21-4f2e-91b3-4a467353bcc0 ExploitThird Party Advisory
https://github.com/purehate/CVE-2025-64155-hunter 134c704f-9b21-4f2e-91b3-4a467353bcc0

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft November 2025 Patch Tuesday - 63 Vulnerabilities, Including 1 ...

web:cybersecuritynews.com

Microsoft rolled out its November 2025 Patch Tuesday security updates today, addressing 63 vulnerabilities across its product and service ecosystem. Among these, one zero-day flaw has already been exploited in the wild, underscoring the urgency for organizations and users to apply patches promptly to mitigate potential threats. The updates cover Windows, Office, Azure, Visual Studio, and other ...

2026-05-22 15:03 UTC
Nvd - Cve-2025-64155

web:nvd.nist.gov

Secure .gov websites use HTTPS A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

2026-05-22 15:03 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 15:03 UTC
Microsoft November 2025 Patch Tuesday fixes 1 zero-day, 63 flaws

web:www.bleepingcomputer.com

Today is Microsoft's November 2025 Patch Tuesday, which includes security updates for 63 flaws, including one actively exploited zero-day vulnerability.

2026-05-22 15:03 UTC
PDF CYBER ADVISORY - caloes.ca.gov

web:www.caloes.ca.gov

CVE-2025-64155 is not currently known to be exploited in the wild or as a zero-day, but there is weaponized code publicly available. The vendor has issued a security advisory with patching and workaround instructions.2 The Cal-CSIC recommends immediately following the vendor's guidance in mitigation and remediation , to include immediate patching.

2026-05-22 15:03 UTC
Microsoft November 2025 Security Updates | Windows 11 Forum

web:www.elevenforum.com

November 2025 Security Updates This release consists of the following 63 Microsoft CVEs : Tag CVE Base Score CVSS Vector Exploitability FAQs? Workarounds? Mitigations ? Nuance PowerScribe CVE - 2025 -30398 Microsoft Configuration Manager CVE - 2025 -47179 Microsoft Office Excel CVE - 2025 -59240 SQL...

2026-05-22 15:03 UTC
CVE-2025-64155: In the Wild Exploitation of FortiSIEM for ...

web:www.greenbone.net

Summary CVE-2025-64155 (CVSS 9.8) is a critical, unauthenticated, root-level remote code execution vulnerability in FortiSIEM that was disclosed and patched by Fortinet on January 13, 2026. Honeypot exploitation activity was observed almost immediately after disclosure, increasing risk for any exposed or reachable FortiSIEM deployments.

2026-05-22 15:03 UTC
November 2025 Patch Tuesday | Ivanti

web:www.ivanti.com

November 2025 Patch Tuesday is fairly quiet. Your highest priority is the Windows OS update, which resolves one known exploited CVE .

2026-05-22 15:03 UTC
November 2025 Microsoft Patch Tuesday | Tenable®

web:www.tenable.com

CVE - 2025 -62215 Windows Kernel vulnerability exploited in the wild as zero-day, one of 63 CVEs patched in the November 2025 Patch Tuesday release.

2026-05-22 15:03 UTC
Microsoft just gave you another reason to update your PC — November's ...

web:www.tomsguide.com

November's Patch Tuesday updates fix 63 flaws in total but two of them are critical vulnerabilities that require your immediate attention.

2026-05-22 15:03 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2025-64155.json.

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