CVE-2026-39920Public exploitNetwork attack vector

Unauthenticated command execution via default Axis2 credentials

Published Apr 24, 2026 · Updated Apr 24, 2026

Remote code execution in BridgeHead Software FileStore before 24A allows remote attackers to run OS commands through Axis2 administration. The network-exposed Axis2 console accepts configured default credentials, permits an authenticated service archive upload, and deploys the archive as a SOAP-callable Java service. No prior account or user interaction is required; successful exploitation runs attacker-supplied commands on the FileStore host.

CVSS severity9.3
Critical
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in BridgeHead Software FileStore before 24A allows remote attackers to run OS commands through Axis2 administration. The network-exposed Axis2 console accepts configured default credentials, permits an authenticated service archive upload, and deploys the archive as a SOAP-callable Java service. No prior account or user interaction is required; successful exploitation runs attacker-supplied commands on the FileStore host.

The record

CVE
CVE-2026-39920
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
BridgeHead Software
Product
FileStore
Classifications
CWE-1188, CWE-1391, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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.

  1. Affected versionversion=0 <24A

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BridgeHead Software · FileStoreversion=0 <24A

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1188Initialization of a Resource with an Insecure Default
CWE-1391Use of Weak Credentials
T1190Exploit Public-Facing Application
T1505.003Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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