CVE-2026-20797

MEDIUM
2026-02-27 [email protected]
4.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 27, 2026 - 02:16 nvd
MEDIUM 4.3

Tags

Buffer Overflow Xweb 500b Pro Firmware Xweb 300d Pro Firmware Xweb 500d Pro Firmware

Description

A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

Analysis

Unauthenticated attackers can exploit a stack buffer overflow in XWEB Pro firmware (versions 1.12.1 and earlier) through an unprotected API endpoint to corrupt memory and crash the affected device. This vulnerability impacts Xweb 500b Pro, 300d Pro, and 500d Pro models, causing denial of service with no authentication required. …

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Remediation

Within 30 days: Identify affected systems running an API route of XWEB Pro and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +22
POC: 0

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CVE-2026-20797 vulnerability details – vuln.today
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