WebPros Comet Backup up to 26.4.2/26.4.x Backup Agent Signing code injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in WebPros Comet Backup up to 26.4.2/26.4.x. This affects an unknown function of the component Backup Agent Signing Module. Such manipulation leads to code injection. This vulnerability is uniquely identified as CVE-2026-32999. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in WebPros Comet Backup up to 26.4.2/26.4.x. Affected by this issue is an unknown part of the component Backup Agent Signing Module. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Insufficient character filtering in backup agent signing module on Comet Backup server allows authenticated tenant administrator to execute an arbitrary code on behalf of a privileged user on the affected server and connected devices.

The advisory is shared for download at support.cometbackup.com. This vulnerability is handled as CVE-2026-32999 since 03/17/2026. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 26.4.3 or 26.5.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-6644) and EUVD (EUVD-2026-32715). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.0
CNA Vector (hackerone): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Comet Backup 26.4.3/26.5.0

Timelineinfo

03/17/2026 CVE reserved
05/28/2026 +71 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
05/31/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: support.cometbackup.com
Status: Confirmed

CVE: CVE-2026-32999 (🔒)
GCVE (CVE): GCVE-0-2026-32999
GCVE (VulDB): GCVE-100-366572
EUVD: 🔒
CNNVD: CNNVD-202605-6644 - WebPros Comet Backup 安全漏洞

Entryinfo

Created: 05/28/2026 07:16
Updated: 05/31/2026 22:58
Changes: 05/28/2026 07:16 (65), 05/28/2026 10:25 (1), 05/30/2026 01:09 (6), 05/31/2026 02:08 (1), 05/31/2026 22:58 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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