CVE-2026-27515Network attack vector

Unauthenticated session hijacking via predictable identifiers

Published Feb 24, 2026 · Updated Feb 24, 2026

Predictable session identifiers in Binardat 10G08-0800GSM firmware before V300SP10260209 allow remote attackers to hijack web sessions. The web management interface generates numeric session identifiers with insufficient randomness, making valid values guessable. No credentials or user interaction are required, but a valid authenticated session must exist; a successful guess grants that session's access.

CVSS severity9.3
Critical
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable session identifiers in Binardat 10G08-0800GSM firmware before V300SP10260209 allow remote attackers to hijack web sessions. The web management interface generates numeric session identifiers with insufficient randomness, making valid values guessable. No credentials or user interaction are required, but a valid authenticated session must exist; a successful guess grants that session's access.

The record

CVE
CVE-2026-27515
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Binardat
Product
10G08-0800GSM Network Switch
Classifications
CWE-330, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 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 <V300SP10260209

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Binardat · 10G08-0800GSM Network Switchversion=0 <V300SP10260209

Published CVSS scores

9.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA: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 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-330Use of Insufficiently Random Values
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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