CVE-2022-26500 - Veeam Backup & Replication - Unrestricted File Upload 💰

[princechaddha]

Description:

Veeam Backup & Replication contains an improper limitation of path names caused by insufficient validation in internal API functions, letting remote authenticated users upload and execute arbitrary code.

Severity: High (CVSS: 8.8)

Vulnerability Details:

• CVE ID: CVE-2022-26500
• CWE: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)
• Affected Versions: 9.5U3, 9.5U4, 10.x, and 11.x
• Attack Vector: Network
• Authentication: Required (logged_in)
• Impact: Remote Code Execution

POC:

• https://cloudsek.com/threatintelligence/multiple-rce-vulnerabilities-affecting-veeam-backup-replication/
• https://www.veeam.com/kb4288

KEV: True ✅

CISA KEV: Added 2022-12-13
Known Ransomware Campaign: Yes (Cuba, AvosLocker, LockBit)

EPSS Score: 0.25477 (96.037th percentile)

Shodan Query: "Veeam Backup" http.title:"Veeam Backup Enterprise Manager"

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Acceptance Criteria: The template must include a complete POC and should not rely solely on version-based detection. Contributors must share vulnerable setup information or a testable instance by emailing templates@projectdiscovery.io. Providing a testable instance significantly reduces validation time and increases the chance of quicker rewards. Templates that are incomplete, invalid, or non-verifiable will not be accepted. Avoid submitting code templates for CVEs that can be detected using HTTP, TCP, or JavaScript only these are blocked by default and will not produce results. Exceptions may apply for certain cases. Do not submit AI-simulated vulnerable environments. To qualify for the bounty, the team must be able to fully validate the POC. If you have hosted a vulnerable environment for validation, send the details (IP or Docker setup) along with the PR number to templates[at]projectdiscovery.io

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References:

• https://veeam.com
• https://www.veeam.com/kb4288
• https://securelist.com/cuba-ransomware/110533/
• https://www.kroll.com/en/insights/publications/cyber/avoslocker-ransomware-update
• https://blog.qualys.com/vulnerabilities-threat-research/2025/05/08/inside-lockbit-defense-lessons-from-the-leaked-lockbit-negotiations

You can check the FAQ for the Nuclei Templates Community Rewards Program here

[princechaddha]

/bounty $200

[algora-pbc]

💎 $200 bounty • ProjectDiscovery Bounty Available for CVE Template Contribution

Steps to Contribute:

• Claim attempt: Comment /attempt #13434 on this issue to claim attempt. Multiple participants can attempt, but only the first to submit a complete POC template along with full debug data will receive the reward similar to bug bounty programs.
• Write the Template: Create a high-quality Nuclei template for the specified CVE, following our Contribution Guidelines and Acceptance Criteria.
• Submit the Template: Open a pull request (PR) to projectdiscovery/nuclei-templates and include /claim #13434 in the PR body to claim the bounty.
• Receive Payment: Upon successful merge of your PR, you will receive 100% of the bounty through Algora.io within 2-5 days. Ensure you are eligible for payouts.

Thank you for contributing to projectdiscovery/nuclei-templates and helping us democratize security!

Acceptance Criteria: The template must include a complete POC and should not rely solely on version-based detection. Contributors must share vulnerable setup information or a testable instance by emailing templates@projectdiscovery.io. Providing a testable instance significantly reduces validation time and increases the chance of quicker rewards. Templates that are incomplete, invalid, or non-verifiable will not be accepted. Avoid submitting code templates for CVEs that can be detected using HTTP, TCP, or JavaScript only these are blocked by default and will not produce results. Exceptions may apply for certain cases. Do not submit AI-simulated vulnerable environments. To qualify for the bounty, the team must be able to fully validate the POC. If you have hosted a vulnerable environment for validation, send the details (IP or Docker setup) along with the PR number to templates[at]projectdiscovery.io

You can check the FAQ for the Nuclei Templates Community Rewards Program here.

Add a bounty • Share on socials

Attempt	Started (UTC)	Solution	Actions
🟢 @keremercin	Oct 02, 2025, 03:07:50 AM	WIP
🟢 @naaa760	Oct 02, 2025, 10:23:12 AM	#13461	Reward

[Pranjal6955]

/attempt #13433

[keremercin]

/attempt #13434

[naaa760]

/attempt #13434

[naaa760]

@princechaddha
I have now created and validated the CVE-2022-26500 template for veeam Backup & Replication unrestricted file upload vulnerability.
let me know!