CVE-2026-3749

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 35.1% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-08 16:02Z6 MO AGO

Last updated

2026-03-11 19:39Z5 MO AGO

Reserved

2026-03-07

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-284Improper Access ControlPillar
• CWE-434Unrestricted Upload of File with Dangerous TypeBase

Data version

5.2

Document digest

48be7215f8503d43405c10c00b51486ac8a209ee429efd06df0d998136ac937a

• vuldb.comVDB-349727 | Bytedesk SVG File UploadRestService.java handleFileUpload unrestricted uploadhttps://vuldb.com/?id.349727vdb-entrytechnical-description
• vuldb.comVDB-349727 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/?ctiid.349727signaturepermissions-required
• vuldb.comSubmit #768030 | Bytedesk <=1.3.9 Unrestricted Upload of File with Dangerous Type (CWE-434)https://vuldb.com/?submit.768030third-party-advisory
• github.comhttps://github.com/Bytedesk/bytedesk/issues/19issue-tracking
• github.comhttps://github.com/Bytedesk/bytedesk/issues/19#issuecomment-3976672845issue-tracking
• github.comhttps://github.com/Bytedesk/bytedesk/issues/19#issue-3993480676exploitissue-tracking
• github.comhttps://github.com/Bytedesk/bytedesk/commit/975e39e4dd527596987559f56c5f9f973f64eff7patch
• github.comhttps://github.com/Bytedesk/bytedesk/releases/tag/v1.4.5.1patch
• github.comhttps://github.com/Bytedesk/bytedesk/product