# CVE-2026-89077: Progress MOVEit Transfer SFTP authentication algorithm incorrect implementation

Source: https://junglewise.ai/threats/cve-2026-89077-incorrect-implementation-of-authentication-algorithm  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-89077 · Severity: high · CVSS 7.5 · Published 2026-10-14

Progress MOVEit Transfer is a secure file transfer application used by organizations to manage data exchange. An incorrect implementation of the authentication algorithm in its SFTP module could allow attackers to bypass authentication controls and gain unauthorized access to transferred files and systems. This affects versions before 2025.1.6 and 2026.0.0 before 2026.0.4.

Technologies: [Progress MOVEit Transfer](https://junglewise.ai/threats/technologies/moveit-transfer). Vendors: [Progress](https://junglewise.ai/threats/vendors/progress).

## Quick answers

**Is CVE-2026-89077 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89077 being exploited in the wild.

**How severe is CVE-2026-89077?** High severity, with a CVSS score of 7.5, published 14 October 2026.

**Which products and versions are affected?** Progress MOVEit Transfer before 2025.1.6 and from 2026.0.0 before 2026.0.4.

**Is there a fix for CVE-2026-89077?** Yes: fixed in MOVEit Transfer 2025.1.6, 2026.0.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-89077 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-89077?** Check whether you run Progress MOVEit Transfer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in MOVEit Transfer 2025.1.6, 2026.0.4

## Technical details

The SFTP module in MOVEit Transfer contains an authentication algorithm implemented incorrectly, which could allow an attacker on the network to bypass authentication mechanisms. The vulnerability requires network access to the SFTP service and does not require prior authentication or user interaction. Successful exploitation would grant unauthorized access to file transfer functionality.

## Affected products

- Progress MOVEit Transfer before 2025.1.6 and from 2026.0.0 before 2026.0.4

## Timeline

- 2026-10-14: advisory

## References

- [https://community.progress.com/s/article/MOVEit-Transfer-Critical-Security-Bulletin---September-2026](https://community.progress.com/s/article/MOVEit-Transfer-Critical-Security-Bulletin---September-2026)

## Related threats

- [Progress MOVEit Transfer SQL injection in Custom Reports](https://junglewise.ai/threats/cve-2026-89076-improper-neutralization-of-special-elements-used-in-an-sql)
- [Progress MOVEit Transfer insecure storage of sensitive information](https://junglewise.ai/threats/cve-2026-89075-insecure-storage-of-sensitive-information-vulnerability-in)
- [Progress MOVEit Transfer unicode encoding handling vulnerability](https://junglewise.ai/threats/cve-2026-89074-improper-handling-of-unicode-encoding-vulnerability-in-progress)
- [Progress MOVEit Transfer insufficient session expiration](https://junglewise.ai/threats/cve-2026-89073-insufficient-session-expiration-vulnerability-in-progress-moveit)
- [Progress MOVEit Transfer incorrect authorization in Client Certificates](https://junglewise.ai/threats/cve-2026-89072-incorrect-authorization-vulnerability-in-progress-moveit-transfer)