This vulnerability is due to unsecured deserialization of web-management user-controlled data. An attacker could exploit this vulnerability by authenticating to the device and sending a crafted HTTP payload. A successful exploit could allow the attacker to save the crafted payload and then execute it on the underlying operating system as root.
To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (read-only).
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Cisco | Cisco Secure Firewall Management Center (FMC) | unknown |
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| Cisco | Secure Firewall Management Center | 88% |
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Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Sat, 19 Sep 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco
Cisco secure Firewall Management Center |
|
| Vendors & Products |
Cisco
Cisco secure Firewall Management Center |
Thu, 17 Sep 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 16 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in Cisco Secure FMC Software could allow an authenticated, remote attacker to execute arbitrary commands at the root privilege level. This vulnerability is due to unsecured deserialization of web-management user-controlled data. An attacker could exploit this vulnerability by authenticating to the device and sending a crafted HTTP payload. A successful exploit could allow the attacker to save the crafted payload and then execute it on the underlying operating system as root. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (read-only). | |
| Title | Cisco Secure Firewall Management Center Software Deserialization Arbitrary Root Command Execution Vulnerability | |
| Weaknesses | CWE-502 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-09-18T03:56:07.878Z
Reserved: 2025-10-08T11:59:15.413Z
Link: CVE-2026-20340
Vulnrichment
Updated: 2026-09-17T16:02:25.178Z
NVD
Status : Awaiting Analysis
Published: 2026-09-16T21:17:11.560
Modified: 2026-09-18T13:28:28.567
Link: CVE-2026-20340
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-19T22:36:11Z
-
CWE-502
Deserialization of Untrusted Data