CVE-2026-4746Network attack vector

Unauthenticated memory corruption via gzip header overwrite

Published Mar 24, 2026 · Updated Mar 24, 2026

Out-of-bounds write in Timeplus Proton before 1.6.16 allows remote attackers to corrupt server memory through crafted gzip headers. The cloned inflate() code copies gzip extra-field bytes into head->extra without first ensuring that its computed offset is below extra_max. No authentication or user interaction is required over the network, and successful corruption can crash the server or enable code execution.

CVSS severity10.0
Critical
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Timeplus Proton before 1.6.16 allows remote attackers to corrupt server memory through crafted gzip headers. The cloned inflate() code copies gzip extra-field bytes into head->extra without first ensuring that its computed offset is below extra_max. No authentication or user interaction is required over the network, and successful corruption can crash the server or enable code execution.

The record

CVE
CVE-2026-4746
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Timeplus
Product
Timeplus Proton
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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 <1.6.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Timeplus · Timeplus Protonversion=0 <1.6.16

Published CVSS scores

10.0Government Technology Agency of Singapore Cyber Security GroupCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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