Is CVE-2026-81946 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-81946 being exploited in the wild.

How severe is CVE-2026-81946?

Medium severity, with a CVSS score of 4.4, published 18 September 2026.

Which products and versions are affected?

PLANET IGS-5225-8P2T4S V1 firmware before 1.2412b260707; PLANET IGS-5225-8P2T4S V2 firmware before 2.2412b260519.

Is there a fix for CVE-2026-81946?

A patch was published on 2026-09-18: Firmware 1.2412b260707 (V1) and 2.2412b260519 (V2) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-81946 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-81946?

Check whether you run PLANET IGS-5225-8P2T4S V1 or PLANET IGS-5225-8P2T4S V2 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.

CVE-2026-81946: PLANET IGS-5225-8P2T4S weak password hashing in firmware

CVE-2026-81946 · Severity: medium · CVSS 4.4 · Published 2026-09-18

The PLANET IGS-5225-8P2T4S industrial managed switch uses MD5-based password hashing in its firmware, a cryptographic method that can be cracked quickly by attackers. If an attacker gains access to the device configuration file, they can recover the privileged administrator password and compromise the switch controlling industrial network traffic. This affects both V1 and V2 hardware versions running older firmware.

Technologies: PLANET IGS-5225-8P2T4S V1, PLANET IGS-5225-8P2T4S V2. Vendors: PLANET.

Quick answers

Is CVE-2026-81946 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-81946 being exploited in the wild.
How severe is CVE-2026-81946?: Medium severity, with a CVSS score of 4.4, published 18 September 2026.
Which products and versions are affected?: PLANET IGS-5225-8P2T4S V1 firmware before 1.2412b260707; PLANET IGS-5225-8P2T4S V2 firmware before 2.2412b260519.
Is there a fix for CVE-2026-81946?: A patch was published on 2026-09-18: Firmware 1.2412b260707 (V1) and 2.2412b260519 (V2) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-81946 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-81946?: Check whether you run PLANET IGS-5225-8P2T4S V1 or PLANET IGS-5225-8P2T4S V2 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

CVE-2026-81946 involves use of HMAC-MD5 for password hashing in the switch firmware, which is vulnerable to brute-force attacks due to MD5's cryptographic weaknesses. An attacker with access to the device configuration file (requiring local or prior network access to extract it) can recover the privileged-mode password through offline cracking. The vendor has patched this by replacing HMAC-MD5 with HMAC-SHA-256 in firmware versions 1.2412b260707 (V1) and 2.2412b260519 (V2).

Affected products

PLANET IGS-5225-8P2T4S V1 firmware before 1.2412b260707
PLANET IGS-5225-8P2T4S V2 firmware before 2.2412b260519

Timeline

2026-09-18: disclosed
2026-09-18: patched: Firmware 1.2412b260707 (V1) and 2.2412b260519 (V2)

References

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