CVE-2026-42958

Code execution via file-parser use-after-free

Published Jul 7, 2026 · Updated Jul 7, 2026

Use-after-free in Labcenter Proteus Design Suite 9.1 SP4 build 42914 allows attackers to execute code when a user opens a crafted file. The file parser reuses freed memory while processing attacker-controlled content, but the affected parser and object are undisclosed. User interaction is required, and successful exploitation runs code with the privileges of the current process.

CVSS severity8.4
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Labcenter Proteus Design Suite 9.1 SP4 build 42914 allows attackers to execute code when a user opens a crafted file. The file parser reuses freed memory while processing attacker-controlled content, but the affected parser and object are undisclosed. User interaction is required, and successful exploitation runs code with the privileges of the current process.

The record

CVE
CVE-2026-42958
Published
Jul 7, 2026
Updated
Jul 7, 2026
Vendor
Labcenter Electronics Limited
Product
Proteus Design Suite
Classifications
CWE-416, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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=9.1_SP4_Build-42914

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Labcenter Electronics Limited · Proteus Design Suiteversion=9.1_SP4_Build-42914

Published CVSS scores

7.8ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.4ICS-CERTCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1204.002Malicious File
T1203Exploitation for Client Execution

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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