CVE-2026-29200Network attack vector

Cross-tenant account takeover via IDOR API call

Published May 4, 2026 · Updated May 4, 2026

IDOR in WebPros Comet Backup 20.11.0 through 26.1.1 and 26.2.0 through 26.2.1 allows remote authenticated users to impersonate users. The vendor has not identified the API endpoint or described its failed cross-tenant object-authorization check. A tenant administrator account is required, and successful exploitation grants control of any end-user account belonging to another tenant on the same server.

CVSS severity9.9
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in WebPros Comet Backup 20.11.0 through 26.1.1 and 26.2.0 through 26.2.1 allows remote authenticated users to impersonate users. The vendor has not identified the API endpoint or described its failed cross-tenant object-authorization check. A tenant administrator account is required, and successful exploitation grants control of any end-user account belonging to another tenant on the same server.

The record

CVE
CVE-2026-29200
Published
May 4, 2026
Updated
May 4, 2026
Vendor
WebPros
Product
Comet Backup
Classifications
CWE-639, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 2026Record 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=20.11.0 <26.1.2
  2. Affected versionversion=26.2.0 <26.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WebPros · Comet Backupversion=20.11.0 <26.1.2; version=26.2.0 <26.2.2

Published CVSS scores

9.9HackerOneCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1078Valid Accounts

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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