CVE-2026-8602: In ScadaBR version 1.2.0, a Missing Authentication for Critical Function vulnerability could allow an unauthen

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CRITICAL 9.1REMOTEDOWNGRADE

CVE-2026-8602 is a critical-severity flaw (CVSS 9.1) affecting scadabr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ScadaBR version 1.2.0, a Missing Authentication for Critical Function vulnerability could allow an unauthenticated attacker to send a HTTP GET requests to the SCADA system and inject arbitrary sensor readings.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-05-19
Last modified	2026-07-23

Publisher (CNA): ICS-CERT · Vendor: scadabr

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-19 18:16 UTCPublished CVE record published
2026-07-23 20:10 UTCUpdated Record last modified

scadabr scadabr DOWNGRADE

Affected: 1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2 (Debian / Ubuntu)

apt-cache madison scadabr sudo apt install scadabr=<VERSION_BEFORE_1.2> sudo apt-mark hold scadabr

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

dnf --showduplicates list scadabr sudo dnf downgrade scadabr-<VERSION_BEFORE_1.2> sudo dnf versionlock add scadabr

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-2026-8602?

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

Is CVE-2026-8602 being exploited?

CVE-2026-8602 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-2026-8602 affect?

CVE-2026-8602 affects scadabr. Severity is critical (CVSS 9.1). In ScadaBR version 1.2.0, a Missing Authentication for Critical Function vulnerability could allow an unauthenticated attacker to send a HTTP GET requests to the SCADA system and inject arbitrary sensor readings.

How urgent is CVE-2026-8602?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

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References

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