CVE-2026-21570Network attack vector

Authenticated remote code execution

Published Mar 17, 2026 · Updated Mar 17, 2026

Code injection in affected Atlassian Bamboo Data Center releases allows remote authenticated users to execute code over the network. Atlassian has not published the affected component, input vector, or code path that mishandles attacker-controlled data. Administrative privileges are required, and successful exploitation grants code execution in the Bamboo server process with confidentiality, integrity, and availability impact.

CVSS severity8.6
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in affected Atlassian Bamboo Data Center releases allows remote authenticated users to execute code over the network. Atlassian has not published the affected component, input vector, or code path that mishandles attacker-controlled data. Administrative privileges are required, and successful exploitation grants code execution in the Bamboo server process with confidentiality, integrity, and availability impact.

The record

CVE
CVE-2026-21570
Published
Mar 17, 2026
Updated
Mar 17, 2026
Vendor
Atlassian
Product
Bamboo Data Center
Classifications
CWE-94, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 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=10.0.0 to 10.0.3
  2. Affected versionversion=10.1.0 to 10.1.1
  3. Affected versionversion=10.2.0 to 10.2.15
  4. Affected versionversion=11.0.0 to 11.0.8
  5. Affected versionversion=12.0.0 to 12.0.2
  6. Affected versionversion=12.1.0 to 12.1.2
  7. Affected versionversion=9.6.1 to 9.6.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Atlassian · Bamboo Data Centerversion=10.0.0 to 10.0.3; version=10.1.0 to 10.1.1; version=10.2.0 to 10.2.15; version=11.0.0 to 11.0.8; version=12.0.0 to 12.0.2; version=12.1.0 to 12.1.2; version=9.6.1 to 9.6.23

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6AtlassianCVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

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.

Technologies

Your stack

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Your stack

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