CVE-2026-86405Network attack vector

Unauthenticated payment validation bypass

Published Oct 9, 2026 · Updated Oct 9, 2026

Signature spoofing in Sipay PrestaShop Virtual POS Module allows remote attackers to bypass payment validation over the network. The CNA record identifies improper cryptographic signature verification but does not disclose the affected endpoint or validation operation. No authentication or user interaction is required; specific payment-state changes and downstream consequences are undisclosed.

CVSS severity9.8
Critical
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signature spoofing in Sipay PrestaShop Virtual POS Module allows remote attackers to bypass payment validation over the network. The CNA record identifies improper cryptographic signature verification but does not disclose the affected endpoint or validation operation. No authentication or user interaction is required; specific payment-state changes and downstream consequences are undisclosed.

The record

CVE
CVE-2026-86405
Published
Oct 9, 2026
Updated
Oct 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-347, CAPEC-475
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8TR-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
CAPEC-475Signature Spoofing by Improper Validation

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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