CVE-2026-16548Public exploitNetwork attack vector

Unauthenticated file upload via unchecked response endpoint

Published Aug 4, 2026 · Updated Aug 4, 2026

Arbitrary file upload in Bit Assist before 1.8.2 allows remote attackers to store files through the public response endpoint. The endpoint accepts multipart uploads without checking type, extension, content, or size and writes them under a bare UUID. Persistence requires response storage or mail forwarding for the channel; impact is limited to disk consumption or inert content hosting, not code execution or stored XSS.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Arbitrary file upload in Bit Assist before 1.8.2 allows remote attackers to store files through the public response endpoint. The endpoint accepts multipart uploads without checking type, extension, content, or size and writes them under a bare UUID. Persistence requires response storage or mail forwarding for the channel; impact is limited to disk consumption or inert content hosting, not code execution or stored XSS.

The record

CVE
CVE-2026-16548
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Bit Apps
Product
Bit Assist
Classifications
CWE-434
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bit Apps · Bit Assistversion=0 <1.8.2

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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