# CVE-2026-77153: IBM i missing authorization in Host-Based Printer Subsystem

Source: https://junglewise.ai/threats/cve-2026-77153-ibm-i-7-6-7-5-7-4-and-7-3-could-allow-a-remote-unauthenticated  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-08. Updated: 2026-11-08  
License: CC BY 4.0 with a link back

CVE-2026-77153 · Severity: medium · CVSS 4.8 · Published 2026-11-08

IBM i is an enterprise operating system used for business-critical applications and data management. A vulnerability in its Host-Based Printer Subsystem lacks proper authorization controls, allowing remote attackers without credentials to access and print sensitive files they should not be able to retrieve. This could expose confidential business documents and data to unauthorized parties.

Technologies: [IBM i](https://junglewise.ai/threats/technologies/i). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-77153 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77153 being exploited in the wild.

**How severe is CVE-2026-77153?** Medium severity, with a CVSS score of 4.8, published 8 November 2026.

**Which products and versions are affected?** IBM i 7.3, 7.4, 7.5, 7.6.

**Is there a fix for CVE-2026-77153?** Yes: fixed in IBM i 7.6 PTF SJ11502, 7.5 PTF SJ11523, 7.4 PTF SJ11524, 7.3 PTF SJ11522; Access Client Solutions 1.1.9.15 or later required for compatibility. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-77153 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-77153?** Check whether you run IBM i 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.

## How to fix

- Fixed in IBM i 7.6 PTF SJ11502, 7.5 PTF SJ11523, 7.4 PTF SJ11524, 7.3 PTF SJ11522; Access Client Solutions 1.1.9.15 or later required for compatibility

## Technical details

The Host-Based Printer Subsystem in IBM i versions 7.3 through 7.6 fails to enforce authorization checks (CWE-862), permitting unauthenticated remote attackers to access printer functionality and obtain sensitive information. The vulnerability has a CVSS score of 4.8 with network attack vector, high complexity, and no user interaction required. Fixes are available via PTFs (SJ11502, SJ11523, SJ11524, SJ11522) for each affected version, with compatibility requirements for Access Client Solutions version 1.1.9.15 or later.

## Affected products

- IBM IBM i 7.3, 7.4, 7.5, 7.6

## Timeline

- 2026-10-27: disclosed: Initial publication of security bulletin
- 2026-11-08: advisory

## References

- [https://www.ibm.com/support/pages/node/7294253](https://www.ibm.com/support/pages/node/7294253)

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