CVE-2026-7770: IBM i Access Family 1.1.5.0 through 1.1.9.12 IBM i Access Client Solutions (ACS) is vulnerable to remote code

This month

HIGH 8.8UPGRADE

CVE-2026-7770 is a high-severity flaw (CVSS 8.8) affecting i access client solutions. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM i Access Family 1.1.5.0 through 1.1.9.12 IBM i Access Client Solutions (ACS) is vulnerable to remote code execution when configured to listen for requests from IBM i Navigator.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-74
Published	2026-06-01
Last modified	2026-08-26

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-08-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 19:16 UTCPublished CVE record published
2026-08-26 14:37 UTCUpdated Record last modified

ibm i access client solutions UPGRADE

Affected: >= 1.1.5.0 and < 1.1.9.13

Fixed in: 1.1.9.13

Safe to downgrade to: a release before 1.1.5.0

1. Check installed version

apt-cache policy i-access-client-solutions || rpm -q i-access-client-solutions || i-access-client-solutions --version

2. UPGRADE to 1.1.9.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade i-access-client-solutions

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade i-access-client-solutions

Note

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

3. If no update is available yet, DOWNGRADE to a release before 1.1.5.0 (Debian / Ubuntu)

apt-cache madison i-access-client-solutions sudo apt install i-access-client-solutions=<VERSION_BEFORE_1.1.5.0> sudo apt-mark hold i-access-client-solutions

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list i-access-client-solutions sudo dnf downgrade i-access-client-solutions-<VERSION_BEFORE_1.1.5.0> sudo dnf versionlock add i-access-client-solutions

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-2026-7770?

i access client solutions: upgrade to 1.1.9.13. Exact commands for each OS are on this page.

Is CVE-2026-7770 being exploited?

CVE-2026-7770 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-2026-7770 affect?

CVE-2026-7770 affects i access client solutions. Severity is high (CVSS 8.8). IBM i Access Family 1.1.5.0 through 1.1.9.12 IBM i Access Client Solutions (ACS) is vulnerable to remote code execution when configured to listen for requests from IBM i Navigator.

How urgent is CVE-2026-7770?

Priority 41/100. High severity

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References

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