CVE-2021-37579Public exploitNetwork attack vector

Pre-authentication code execution via service-version mismatch

Published Sep 9, 2021 · Updated Aug 4, 2024

Unsafe deserialization in Apache Dubbo 2.7.0 through 2.7.12 and 3.0.0 through 3.0.1 allows remote attackers to execute arbitrary code. DecodeableRpcInvocation.decode passes attacker-chosen path and version values to CodecSupport.checkSerialization; an unmatched provider model only logs a warning before native Java readObject processes an argument. A reachable Dubbo provider and valid service path are required, but authentication and user interaction are not; code runs with the service account's privileges.

CVSS severity9.8
Critical
EPSS probability6.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Apache Dubbo 2.7.0 through 2.7.12 and 3.0.0 through 3.0.1 allows remote attackers to execute arbitrary code. DecodeableRpcInvocation.decode passes attacker-chosen path and version values to CodecSupport.checkSerialization; an unmatched provider model only logs a warning before native Java readObject processes an argument. A reachable Dubbo provider and valid service path are required, but authentication and user interaction are not; code runs with the service account's privileges.

The record

CVE
CVE-2021-37579
Published
Sep 9, 2021
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Dubbo
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache Dubbo 2.7.x <=2.7.12
  2. Affected versionversion=Apache Dubbo 3.0.x <=3.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Dubboversion=Apache Dubbo 2.7.x <=2.7.12; version=Apache Dubbo 3.0.x <=3.0.1

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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