Root code execution via serialized Java object
Published Mar 4, 2026 · Updated Mar 4, 2026
Insecure deserialization in Cisco Secure Firewall Management Center allows remote attackers to execute Java code as root via a crafted object. The web-based management interface deserializes a user-supplied Java byte stream from the object, allowing attacker-controlled code to run. No credentials or user interaction are required; network access to the management interface is sufficient, and internet exposure increases reachability.
Summary
What happened
Insecure deserialization in Cisco Secure Firewall Management Center allows remote attackers to execute Java code as root via a crafted object. The web-based management interface deserializes a user-supplied Java byte stream from the object, allowing attacker-controlled code to run. No credentials or user interaction are required; network access to the management interface is sufficient, and internet exposure increases reachability.
The record
- CVE
- CVE-2026-20131
- Published
- Mar 4, 2026
- Updated
- Mar 4, 2026
- Vendor
- ClamAV
- Product
- Cisco Secure Firewall Management Center
- Classifications
- CWE-502, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 26, 2026Exploitation reportedInterlock ransomware exploitation campaign
- Mar 4, 2026CVE publishedPublication date reported by the CVE source.
- Mar 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0
- Affected versionversion=6.4.0.13
- Affected versionversion=6.4.0.14
- Affected versionversion=6.4.0.15
- Affected versionversion=6.4.0.16
- Affected versionversion=6.4.0.17
- Affected versionversion=6.4.0.18
- Affected versionversion=7.0.0
- Affected versionversion=7.0.0.1
- Affected versionversion=7.0.1
- Affected versionversion=7.0.1.1
- Affected versionversion=7.0.2
- Affected versionversion=7.0.2.1
- Affected versionversion=7.0.3
- Affected versionversion=7.0.4
- Affected versionversion=7.0.5
- Affected versionversion=7.0.6
- Affected versionversion=7.0.6.1
- Affected versionversion=7.0.6.2
- Affected versionversion=7.0.6.3
- Affected versionversion=7.0.7
- Affected versionversion=7.0.8
- Affected versionversion=7.0.8.1
- Affected versionversion=7.1.0
- Affected versionversion=7.1.0.1
- Affected versionversion=7.1.0.2
- Affected versionversion=7.1.0.3
- Affected versionversion=7.2.0
- Affected versionversion=7.2.0.1
- Affected versionversion=7.2.1
- Affected versionversion=7.2.10
- Affected versionversion=7.2.10.1
- Affected versionversion=7.2.10.2
- Affected versionversion=7.2.2
- Affected versionversion=7.2.3
- Affected versionversion=7.2.3.1
- Affected versionversion=7.2.4
- Affected versionversion=7.2.4.1
- Affected versionversion=7.2.5
- Affected versionversion=7.2.5.1
- Affected versionversion=7.2.5.2
- Affected versionversion=7.2.6
- Affected versionversion=7.2.7
- Affected versionversion=7.2.8
- Affected versionversion=7.2.8.1
- Affected versionversion=7.2.9
- Affected versionversion=7.3.0
- Affected versionversion=7.3.1
- Affected versionversion=7.3.1.1
- Affected versionversion=7.3.1.2
- Affected versionversion=7.4.0
- Affected versionversion=7.4.1
- Affected versionversion=7.4.1.1
- Affected versionversion=7.4.2
- Affected versionversion=7.4.2.1
- Affected versionversion=7.4.2.2
- Affected versionversion=7.4.2.3
- Affected versionversion=7.4.2.4
- Affected versionversion=7.4.3
- Affected versionversion=7.4.4
- Affected versionversion=7.4.5
- Affected versionversion=7.6.0
- Affected versionversion=7.6.1
- Affected versionversion=7.6.2
- Affected versionversion=7.6.2.1
- Affected versionversion=7.6.3
- Affected versionversion=7.6.4
- Affected versionversion=7.7.0
- Affected versionversion=7.7.10
- Affected versionversion=7.7.10.1
- Affected versionversion=7.7.11
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Interlock ransomware exploitation campaignransomware
- CISA Known Exploited Vulnerabilities catalog entryknown exploited catalog
Technologies
Your stack
See the directory against your own environment.
Your stack
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