# Out-of-bounds write in Zyxel GS1900-24E firmware and others

CVE record · `CVE-2026-107441`

- **Identifiers:** `CVE-2026-107441`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Zyxel
- **Weakness (CWE):** [CWE-787](https://cwe.mitre.org/data/definitions/787.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md)
- **Technologies:** [Zyxel GS1900-24E firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-24e-firmware.md) · [Zyxel GS1900-8 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-8-firmware.md) · [Zyxel GS1900-8HP firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-8hp-firmware.md) · [Zyxel GS1900-10HP firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-10hp-firmware.md) · [Zyxel GS1900-16 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-16-firmware.md) · [Zyxel GS1900-24 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-24-firmware.md) · [Zyxel GS1900-24EP firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-24ep-firmware.md) · [Zyxel GS1900-HPv2 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-hpv2-firmware.md) · [Zyxel GS1900-48 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-48-firmware.md) · [Zyxel GS1900-48HPv2 firmware](https://agentprime.io/advisories/technology/zyxel-gs1900-48hpv2-firmware.md)
- **Published:** 3 Nov 2026
- **Updated:** 5 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Zyxel) at 3 Nov 2026, 01:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Zyxel. Product: GS1900-24E firmware.
  - affected: `<= 2.90(AAHK.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-8 firmware.
  - affected: `<= 2.90(AAHH.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-8HP firmware.
  - affected: `<= 2.90(AAHI.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-10HP firmware.
  - affected: `<= 2.90(AAZI.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-16 firmware.
  - affected: `<= 2.90(AAHJ.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-24 firmware.
  - affected: `<= 2.90(AAHL.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-24EP firmware.
  - affected: `<= 2.90(ABTO.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-HPv2 firmware.
  - affected: `<= 2.90(ABTP.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-48 firmware.
  - affected: `<= 2.90(AAHN.2)C0`
  - Other versions: unaffected
- Vendor: Zyxel. Product: GS1900-48HPv2 firmware.
  - affected: `<= 2.90(ABTQ.2)C0`
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Zyxel)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0029, the 22nd percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 3 Nov 2026, 01:41 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-107441)
- 3 Nov 2026, 01:52 UTC: First seen by agentprime
- 3 Nov 2026, 02:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-107441)

## Sources

- [CVE List: CVE-2026-107441](https://www.cve.org/CVERecord?id=CVE-2026-107441)
- [NVD: CVE-2026-107441](https://nvd.nist.gov/vuln/detail/CVE-2026-107441)

### References from the CNA

- <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)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-107441>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-107441/>. Everything for agents: <https://agentprime.io/llms.txt>.