# CVE-2026-105982: Welotec TK routers command injection in IPsec VPN

Source: https://junglewise.ai/threats/cve-2026-105982-improper-input-validation-in-the-ipsec-vpn-function-may-allow-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-105982 · Severity: high · CVSS 7.2 · Published 2026-11-03

Welotec TK routers are industrial networking devices used in critical infrastructure environments. An authenticated attacker with high privileges can inject malicious commands through the IPsec VPN configuration function and execute them with root privileges, potentially compromising the entire device and any systems it controls.

Technologies: [Welotec TK100](https://junglewise.ai/threats/technologies/tk100), [Welotec TK500-v2](https://junglewise.ai/threats/technologies/tk500-v2), [Welotec TK500-v3](https://junglewise.ai/threats/technologies/tk500-v3). Vendors: [Welotec](https://junglewise.ai/threats/vendors/welotec).

## Quick answers

**Is CVE-2026-105982 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105982 being exploited in the wild.

**How severe is CVE-2026-105982?** High severity, with a CVSS score of 7.2, published 3 November 2026.

**Which products and versions are affected?** Welotec TK100 before 3.5.116; Welotec TK500-v2 before 1.0.124; Welotec TK500-v3 before 1.0.123.

**Is there a fix for CVE-2026-105982?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-105982 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-105982?** Check whether you run Welotec TK100, Welotec TK500-v2 or Welotec TK500-v3 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Improper input validation in the IPsec VPN function (CWE-77) allows command injection. The vulnerability requires network access and high-privilege authentication but no user interaction. Successful exploitation grants root-level code execution on the affected router.

## Affected products

- Welotec TK100 before 3.5.116
- Welotec TK500-v2 before 1.0.124
- Welotec TK500-v3 before 1.0.123

## Timeline

- 2026-11-03: disclosed

## References

- [https://www.certvde.com/en/advisories/VDE-2026-119/](https://www.certvde.com/en/advisories/VDE-2026-119/)

## Related threats

- [Welotec TK router buffer overflow in Digital I/O function](https://junglewise.ai/threats/cve-2026-109161-insufficient-bounds-checking-in-the-digital-i-o-function-may)
- [Welotec TK routers OS command injection in Digital I/O](https://junglewise.ai/threats/cve-2026-105981-improper-input-validation-in-the-digital-i-o-function-may-allow)
- [Welotec TK router ZeroTier VPN command injection](https://junglewise.ai/threats/cve-2026-105979-improper-input-validation-in-the-zerotier-vpn-function-may-allow)
- [Welotec TK router OS command injection in management functions](https://junglewise.ai/threats/cve-2026-105978-improper-input-validation-in-management-control-functions-may)