CVE-2026-73379Network attack vector

Protected-data access via authentication bypass

Published Aug 18, 2026 · Updated Aug 18, 2026

Authentication bypass in Contact Form by Supsystic before 1.10.0 allows remote attackers to access protected form data. Patchstack and NVD do not disclose the vulnerable endpoint, action, parameter, or code path, so the alternate path or channel that skips the intended access check is not public. The published CVSS 3.1 vector requires no authentication or user interaction and bounds the consequence to limited confidentiality and integrity impact, with no published service interruption.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Contact Form by Supsystic before 1.10.0 allows remote attackers to access protected form data. Patchstack and NVD do not disclose the vulnerable endpoint, action, parameter, or code path, so the alternate path or channel that skips the intended access check is not public. The published CVSS 3.1 vector requires no authentication or user interaction and bounds the consequence to limited confidentiality and integrity impact, with no published service interruption.

The record

CVE
CVE-2026-73379
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Supsystic
Product
Contact Form by Supsystic
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=n/a <1.10.0 changes=[{"at":"1.10.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Supsystic · Contact Form by Supsysticversion=n/a <1.10.0 changes=[{"at":"1.10.0","status":"unaffected"}]

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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