CVE-2026-32999Network attack vector

Authenticated RCE via uploaded codesigning executables

Published May 28, 2026 · Updated May 28, 2026

Code injection in WebPros Comet Backup before 26.4.3 or 26.5.0 allows remote authenticated users to execute code through agent signing. The signing workflow accepts tenant-uploaded DLL or SO executables from branding configuration and loads them for code signing. Tenant-administrator branding permission and client generation are required; execution runs as cometd and can reach connected devices.

CVSS severity9.0
Critical
EPSS probability0.31%
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 WebPros Comet Backup before 26.4.3 or 26.5.0 allows remote authenticated users to execute code through agent signing. The signing workflow accepts tenant-uploaded DLL or SO executables from branding configuration and loads them for code signing. Tenant-administrator branding permission and client generation are required; execution runs as cometd and can reach connected devices.

The record

CVE
CVE-2026-32999
Published
May 28, 2026
Updated
May 28, 2026
Vendor
WebPros
Product
Comet Backup
Classifications
CWE-94, T1129
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=0 <26.4.3
  2. Affected versionversion=0 <26.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WebPros · Comet Backupversion=0 <26.4.3; version=0 <26.5.0

Published CVSS scores

9.0HackerOneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1129Shared Modules

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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