CVE-2026-5494: Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

Routine

HIGH 7.8DOWNGRADE

CVE-2026-5494 is a high-severity flaw (CVSS 7.8) affecting proteus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Labcenter Electronics Proteus. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of PDSPRJ files. The issue results

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-11
Last modified	2026-10-26

Publisher (CNA): Zero Day Initiative · Vendor: labcenter

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-11 01:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

labcenter proteus DOWNGRADE

Affected: 8.17 sp5

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.17

1. Check installed version

apt-cache policy proteus || rpm -q proteus || proteus --version

2. No fixed release: DOWNGRADE to a release before 8.17 (Debian / Ubuntu)

apt-cache madison proteus sudo apt install proteus=<VERSION_BEFORE_8.17> sudo apt-mark hold proteus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list proteus sudo dnf downgrade proteus-<VERSION_BEFORE_8.17> sudo dnf versionlock add proteus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5494?

proteus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5494 being exploited?

CVE-2026-5494 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5494 affect?

CVE-2026-5494 affects proteus. Severity is high (CVSS 7.8). Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Labcenter Electronics Proteus. User

How urgent is CVE-2026-5494?

Priority 32/100. High severity

Related CVEs

CVE-2026-5493 HIGH 7.8 DOWNGRADE Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
CVE-2026-5495 HIGH 7.8 DOWNGRADE Labcenter Electronics Proteus PDSPRJ File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
CVE-2026-5496 HIGH 7.8 DOWNGRADE Labcenter Electronics Proteus PDSPRJ File Parsing Type Confusion Remote Code Execution Vulnerability

References

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