What is CVE-2026-81946?

CVE-2026-81946 is a medium-severity vulnerability in Planet Technology Corp. Igs-5225-8p2t4s V1, classified under Stack-based Buffer Overflow. CVSS score: 4.4/10. Published 2026-09-18.

How severe is CVE-2026-81946?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Buffer overflow in Planet Technology Corp. Igs-5225-8p2t4s V1

CVE-2026-81946

PLANET IGS-5225-8P2T4S industrial managed switch V1 and V2 firmware versions before 1.2412b260707 and 2.2412b260519 use MD5-based password hashing, a cryptographic algorithm with known weaknesses. An attacker who obtains the device configuration file can recover the privileged-mode access password.

Vulnerability class: Buffer Overflow

Published 2026-09-18 · last modified 2026-09-22.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.8th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.planet.com.tw/en/support/security-advisory/11 (vendor-advisory, patch)
www.vulncheck.com/advisories/planet-igs-5225-8p2t4s-v1-v2-weak-password-hashing… (third-party-advisory)

Frequently asked questions

What is CVE-2026-81946?: CVE-2026-81946 is a medium-severity vulnerability in Planet Technology Corp. Igs-5225-8p2t4s V1, classified under Stack-based Buffer Overflow. CVSS score: 4.4/10. Published 2026-09-18.
How severe is CVE-2026-81946?: Medium severity. CVSS v3 base score is 4.4 out of 10.