CVE-2022-26501Known exploitationNetwork attack vector

Unauthenticated code execution via exposed internal API

Published Mar 17, 2022 · Updated Oct 21, 2025

Improper authentication in Veeam Backup & Replication 9.5U3, 9.5U4, 10.x, and 11.x allows remote attackers to execute code. The Veeam Distribution Service on TCP port 9380 exposes internal API functions without authentication and accepts input that enables malicious-code upload and execution. Network access to the service is the only reported gate, and successful exploitation grants control of the target system.

CVSS severity9.8
Critical
EPSS probability4.10%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Veeam Backup & Replication 9.5U3, 9.5U4, 10.x, and 11.x allows remote attackers to execute code. The Veeam Distribution Service on TCP port 9380 exposes internal API functions without authentication and accepts input that enables malicious-code upload and execution. Network access to the service is the only reported gate, and successful exploitation grants control of the target system.

The record

CVE
CVE-2022-26501
Published
Mar 17, 2022
Updated
Oct 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NISTAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

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

Technologies

Your stack

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Your stack

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