Cyber Posture

CVE-2026-8758

High

Published: 17 May 2026

Published
17 May 2026
Modified
18 May 2026
KEV Added
Patch
CVSS Score 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0004 11.4th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-8758 is a high-severity Improper Access Control (CWE-284) vulnerability in Feishu (inferred from references). Its CVSS base score is 7.3 (High).

Operationally, ranked at the 11.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-284 CWE-434

This control enforces ownership-based restrictions on portable storage device use, directly implementing access control over media insertion into organizational systems.

addresses: CWE-284 CWE-434

Hardware write-protect enforces access control on critical resources (e.g., firmware) independent of software state.

addresses: CWE-284

The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.

addresses: CWE-284

Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.

addresses: CWE-284

Supervision and review of access control activities directly detects and remediates improper access configurations or usages.

addresses: CWE-284

Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.

addresses: CWE-284

By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.

addresses: CWE-284

Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.

NVD Description

A vulnerability was determined in Metasoft 美特软件 MetaCRM up to 6.4.0 Beta06. This impacts an unknown function of the file /common/jsp/upload3.jsp. Executing a manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The…

more

exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)

Affected Products

Feishu
inferred from references and description; NVD did not file a CPE for this CVE

CVEs Like This One

CVE-2024-13138Shared CWE-284, CWE-434
CVE-2025-2350Shared CWE-284, CWE-434
CVE-2026-1742Shared CWE-284, CWE-434
CVE-2026-3800Shared CWE-284, CWE-434
CVE-2025-1598Shared CWE-284, CWE-434
CVE-2024-13191Shared CWE-284, CWE-434
CVE-2025-1834Shared CWE-284, CWE-434
CVE-2025-2216Shared CWE-284, CWE-434
CVE-2024-13134Shared CWE-284, CWE-434
CVE-2026-0643Shared CWE-284, CWE-434

References