CVE-2020-10914Public exploitNetwork attack vector

Unauthenticated code execution via handshake deserialization

Published Apr 22, 2020 · Updated Aug 4, 2024

Deserialization of untrusted data in Veeam ONE Agent 9.5.4.4587 allows remote attackers to execute code without authentication. The PerformHandshake method deserializes attacker-controlled .NET data received during the TLS handshake without proper validation. The service listens on TCP 2805 by default, and successful exploitation runs code under the Veeam ONE service account with control of the host.

CVSS severity9.8
Critical
EPSS probability47.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Veeam ONE Agent 9.5.4.4587 allows remote attackers to execute code without authentication. The PerformHandshake method deserializes attacker-controlled .NET data received during the TLS handshake without proper validation. The service listens on TCP 2805 by default, and successful exploitation runs code under the Veeam ONE service account with control of the host.

The record

CVE
CVE-2020-10914
Published
Apr 22, 2020
Updated
Aug 4, 2024
Vendor
Veeam Software
Product
Veeam ONE Agent
Classifications
CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2020CVE 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=9.5.4.4587

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Veeam Software · Veeam ONE Agentversion=9.5.4.4587

Published CVSS scores

9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NISTAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

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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-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

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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