# CVE-2026-76753: HPE ClearPass Policy Manager format string vulnerability

Source: https://junglewise.ai/threats/cve-2026-76753-a-format-string-vulnerability-in-an-affected-service-interface-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-76753 · Severity: critical · CVSS 9.8 · Published 2026-10-06

HPE ClearPass Policy Manager is a network access control service that manages authentication and authorization for corporate networks. A format string vulnerability in its service interface allows an unauthenticated attacker to corrupt memory and execute arbitrary code remotely without any user interaction, potentially compromising the entire network security infrastructure.

Technologies: [Hpe ClearPass Policy Manager](https://junglewise.ai/threats/technologies/hpe-clearpass-policy-manager). Vendors: [Hpe](https://junglewise.ai/threats/vendors/hpe).

## Quick answers

**Is CVE-2026-76753 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76753 being exploited in the wild.

**How severe is CVE-2026-76753?** Critical severity, with a CVSS score of 9.8, published 6 October 2026.

**Which products and versions are affected?** HPE ClearPass Policy Manager.

**Is there a fix for CVE-2026-76753?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76753 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76753?** Check whether you run Hpe ClearPass Policy Manager. 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

A format string vulnerability exists in an affected service interface of ClearPass Policy Manager that is reachable without authentication. The vulnerability allows an unauthenticated remote attacker to corrupt process memory via a crafted input, leading to arbitrary code execution on the affected system.

## Affected products

- HPE ClearPass Policy Manager

## Timeline

- 2026-10-06: disclosed

## References

- [https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05158en_us&docLocale=en_US](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05158en_us&docLocale=en_US)

## Related threats

- [HPE ClearPass Policy Manager API authentication bypass](https://junglewise.ai/threats/cve-2026-79818-a-vulnerability-in-an-api-interface-of-clearpass-policy-manager)
- [HPE ClearPass Policy Manager client information disclosure](https://junglewise.ai/threats/cve-2026-79817-a-sensitive-information-disclosure-vulnerability-exists-in-the)
- [HPE Networking ClearPass Policy Manager DOM-based XSS in client interface](https://junglewise.ai/threats/cve-2026-79816-a-vulnerability-in-a-client-interface-of-hpe-networking-clearpass)
- [HPE ClearPass Policy Manager OnGuard agent denial of service](https://junglewise.ai/threats/cve-2026-79812-a-denial-of-service-vulnerability-exists-in-the-onguard-agent-of)
- [HPE ClearPass Policy Manager API SQL injection](https://junglewise.ai/threats/cve-2026-79811-a-sql-injection-vulnerability-in-the-api-of-clearpass-policy)