CVE-2026-107441: Zyxel GS1900-24E firmware vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-04 15:41 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
Description quoted from the CVE record (assigned by Zyxel, published 2026-11-03).
Weakness: CWE-787 Out-of-bounds write
How it can be exploited
Exploitable from an adjacent network with low attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer has no public exploit code naming this CVE. Check Exploit Observer for anything new.
Live scores
- EPSS
- 0.003
low predicted chance of attack - VEDAS
- 0.046
little exploit evidence - On CISA KEV
- Not listed
- Detection rule
- None yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Zyxel GS1900-24E firmware | version <= 2.90(AAHK.2)C0 | Not stated |
| Zyxel GS1900-8 firmware | version <= 2.90(AAHH.2)C0 | Not stated |
| Zyxel GS1900-8HP firmware | version <= 2.90(AAHI.2)C0 | Not stated |
| Zyxel GS1900-10HP firmware | version <= 2.90(AAZI.2)C0 | Not stated |
| Zyxel GS1900-16 firmware | version <= 2.90(AAHJ.2)C0 | Not stated |
| Zyxel GS1900-24 firmware | version <= 2.90(AAHL.2)C0 | Not stated |
| Zyxel GS1900-24EP firmware | version <= 2.90(ABTO.2)C0 | Not stated |
| Zyxel GS1900-HPv2 firmware | version <= 2.90(ABTP.2)C0 | Not stated |
| Zyxel GS1900-48 firmware | version <= 2.90(AAHN.2)C0 | Not stated |
| Zyxel GS1900-48HPv2 firmware | version <= 2.90(ABTQ.2)C0 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Vendor guidance:
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-gs1900-series-switches-11-03-2026 (vendor-advisory)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
Advisories on this CVE
- Zyxel GS1900 switch zero-day CVE-2026-107441 lets attackers run root commands before login, now patched (full advisory)
References
Vendor advisories and patches
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-gs1900-series-switches-11-03-2026 (vendor-advisory)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
Supporting partners
