CVE-2026-34184: AlanWeb SCADA does not enforce authorization for some directories

Q: How do I fix CVE-2026-34184?

control system: upgrade to 9.8.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-34184 being exploited?

CVE-2026-34184 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34184 affect?

CVE-2026-34184 affects control system. Severity is critical (CVSS 9.1). AlanWeb SCADA does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the conn

Q: How urgent is CVE-2026-34184?

Priority 42/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-34184 is a critical-severity flaw (CVSS 9.1) affecting control system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AlanWeb SCADA does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the connected database. This issue was fixed in AlanWeb SCADA version 9.8.5

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): CERT.PL · Vendor: hydrosystem.poznan

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

Am I affected?

Timeline

2026-04-09 10:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

hydrosystem.poznan control system UPGRADE

Affected: < 9.8.5

Fixed in: 9.8.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy control-system || rpm -q control-system || control-system --version

2. UPGRADE to 9.8.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade control-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade control-system

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-34184?

control system: upgrade to 9.8.5. Exact commands for each OS are on this page.

Is CVE-2026-34184 being exploited?

CVE-2026-34184 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-2026-34184 affect?

CVE-2026-34184 affects control system. Severity is critical (CVSS 9.1). AlanWeb SCADA does not enforce authorization for some directories. This allows an unauthorized attacker to read all files in these directories and even execute some of them. Critically the attacker could run PHP scripts directly on the conn

How urgent is CVE-2026-34184?

Priority 42/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-34185 HIGH 8.8 UPGRADE AlanWeb SCADA is vulnerable to SQL Injection across most scripts and input parameters
CVE-2026-4901 MEDIUM 6.5 UPGRADE AlanWeb SCADA saves sensitive information into a log file

References

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