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CVE-2026-107441

Out-of-bounds write in Zyxel GS1900 24E Firmware

CVSS score

8.8

EPSS probability

—

Risk score

0.9

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Out-of-Bounds Write Vulnerability in Zyxel GS1900 Series

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900 series firmware could allow an unauthenticated adjacent attacker to exploit the flaw and potentially execute OS commands via crafted HTTP requests.

Why does it matter?

This vulnerability stands out with a high CVSS score, enabling attackers to execute commands on target devices that could lead to severe confidentiality, integrity, and availability breaches.

What should be done?

  • Follow the vendor security advisory
  • Apply the relevant Zyxel firmware updates
Chain of evidence and sources2 verified claims

Zyxel GS1900 ürün yazılımının CGI programında sınır dışı yazma zafiyeti bulunmaktadır.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet, kimlik doğrulaması gerektirmeyen bitişik bir saldırgan tarafından istismar edilebilir.

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-107441 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1zyxelGS1900-24E firmware View
2zyxelGS1900-8 firmware View
3zyxelGS1900-8HP firmware View
4zyxelGS1900-10HP firmware View
5zyxelGS1900-16 firmware View
6zyxelGS1900-24 firmware View
7zyxelGS1900-24EP firmware View
8zyxelGS1900-HPv2 firmware View
9zyxelGS1900-48 firmware View
10zyxelGS1900-48HPv2 firmware View
Total affected vendors: 1|Products: 10

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.8CVSS V31HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
8.8CVSS V3_1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-107441 is associated with the following CWEs:

CWE-787: Out-of-bounds Write

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-107441 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureBitişik ağ
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-gs1900-series-switches-11-03-2026vendor-advisory

CVSS Vector Radar Chart

8.8 / 10
Attack VectorAdjacentComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorAdjacent network
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

Z
zyxel logo
zyxel

Weakness Type (CWE & CAPEC)

CWE-787

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CVE-2026-107441 · Out-of-bounds write in Zyxel GS1900 24E…