# CVE-2026-7770: IBM i Access Client Solutions remote code execution

Source: https://junglewise.ai/threats/cve-2026-7770-ibm-i-access-client-solutions-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-01. Updated: 2026-06-01  
License: CC BY 4.0 with a link back

CVE-2026-7770 · Severity: high · CVSS 8.8 · Published 2026-06-01

IBM i Access Client Solutions (ACS), a tool used by administrators to manage IBM i systems, is vulnerable to remote code execution. If the software is configured to listen for requests from IBM i Navigator, an attacker could potentially take full control of the system. This could lead to unauthorized access to sensitive business data, service disruptions, or the deployment of malicious software.

Technologies: [IBM i Access Client Solutions](https://junglewise.ai/threats/technologies/i-access-client-solutions). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-7770 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-7770 being exploited in the wild.

**How severe is CVE-2026-7770?** High severity, with a CVSS score of 8.8, published 1 June 2026.

**Which products and versions are affected?** IBM i Access Client Solutions 1.1.5.0 - 1.1.9.12.

**Is there a fix for CVE-2026-7770?** A patch was published on 2026-05-29: Fixes available via Entitled Systems Support (ESS) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-7770 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-7770?** Check whether you run IBM i Access Client Solutions at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

IBM i Access Client Solutions (ACS) versions 1.1.5.0 through 1.1.9.12 contain a remote code execution vulnerability classified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The vulnerability is triggered when ACS is configured to listen for requests from IBM i Navigator. An authenticated attacker with low privileges can exploit this over the network to execute arbitrary code on the target system. The issue has been addressed in version 1.1.9.13, and IBM has also released Program Temporary Fixes (PTFs) for various IBM i releases (7.3 through 7.6).

## Affected products

- IBM i Access Client Solutions (ACS) 1.1.5.0 - 1.1.9.12

## Timeline

- 2026-05-27: advisory: Initial publication by IBM
- 2026-05-29: patched: Fixes available via Entitled Systems Support (ESS)
- 2026-06-01: disclosed: NVD publication date

## References

- [https://www.ibm.com/support/pages/node/7274214](https://www.ibm.com/support/pages/node/7274214)

## Related threats

- [IBM i Access Client Solutions command execution in emulator macro](https://junglewise.ai/threats/cve-2026-14276-ibm-i-access-client-solutions-command-execution-in-emulator-macro)
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- [IBM i Access Client Solutions OS command injection](https://junglewise.ai/threats/cve-2026-16695-ibm-i-access-client-solutions-os-command-injection)
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