🛡️ CVE-2026-20902 — xweb-300d-pro-firmware

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: High — administrative rights are needed first.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-20902 is classified as CWE-78: OS Command Injection. Untrusted input reaches a shell command without neutralisation, so an attacker can run arbitrary operating system commands.

Affected software

CVE-2026-20902 is recorded against 3 packages.

• xweb-300d-pro-firmware (fixed in 1.12.1)
• xweb-500b-pro-firmware (fixed in 1.12.1)
• xweb-500d-pro-firmware (fixed in 1.12.1)

Timeline and source

Published on 27 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
webapps.copeland.com
www.cisa.gov

Other advisories for this package

xweb-300d-pro-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-24689 (8.0 High, published 27 Feb 2026)
• CVE-2026-25111 (8.0 High, published 27 Feb 2026)
• CVE-2026-21389 (8.0 High, published 27 Feb 2026)
• CVE-2026-24663 (9.0 Critical, published 27 Feb 2026)
• CVE-2026-25109 (8.0 High, published 27 Feb 2026)
• CVE-2026-20910 (8.0 High, published 27 Feb 2026)
• CVE-2026-24517 (8.0 High, published 27 Feb 2026)
• CVE-2026-25105 (8.0 High, published 27 Feb 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-78: OS Command Injection) in other software:

• CVE-2023-49900 (9.8 Critical, published 16 Jul 2026)
• CVE-2024-0815 (8.0 High, published 7 Jul 2026)
• CVE-2023-5002 (6.0 Medium, published 7 Jul 2026)
• CVE-2022-40189 (9.8 Critical, published 29 Jun 2026)
• CVE-2021-21386 (9.5 Critical, published 29 Jun 2026)
• CVE-2022-38649 (9.8 Critical, published 29 Jun 2026)
• CVE-2022-45899 (6.5 Medium, published 8 May 2026)
• CVE-2022-50994 (8.1 High, published 8 May 2026)

Details

Affected Packages

References