HPE NonStop iTP WebServer: Memory corruption vulnerability
Summary
A vulnerability in the HPE NonStop iTP WebServer can cause memory corruption and a system shutdown. According to the CVSS vector, an unauthenticated attacker with network access could trigger it without user interaction, leading mainly to a denial of service. The HPE bulletin header describes the impact as local, so the exposure is not yet fully clear.
Affected
- HPE NonStop iTP WebServer prior to T8996L01^AGZ
- HPE NonStop iTP WebServer (ITP SECURE WEBSVR DOMESTIC) prior to T8997L01^AGZ
- Affected range per HPE bulletin HPESBNS05148: T8996 through T8996L01^AGY and T8997 through T8997L01^AGY and earlier
Fixed in
- Patch identifiers most likely T8996L01^AGZ and T8997L01^AGZ (not yet confirmed against the full HPE bulletin text)
Workaround
Unknown. No vendor-documented workaround found.
Exploitation
- No known exploitation in the wild.
- Not listed in CISA KEV.
- No public proof of concept found.
- EPSS score: 0.00318.
- CISA SSVC: exploitation none, automatable yes, technical impact partial.
Our recommendation
- Identify whether NonStop systems run the iTP WebServer or ITP SECURE WEBSVR DOMESTIC.
- Apply the HPE fix from bulletin HPESBNS05148 and confirm the exact patch identifiers for your release first.
- Patch the whole bulletin, as it covers several other NonStop issues, including CVE-2026-79829.
- If patching is not possible yet, restrict access to the web server to trusted networks.
- Monitor the web server for crashes or unexpected restarts.
- Clarify the Local vs. Network discrepancy with HPE.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- HPE Security Bulletin HPESBNS05148 support.hpe.com
- CNA record via Vulners vulners.com
- NVD record via Vulners vulners.com
- Strix CVE-2026-73790 www.strix.ai
- PSIRT aggregator CVE-2026-73790 psirt.com
- Strix CVE-2026-79829 (same bulletin) www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 16:26.
Original description (NVD)
A vulnerability in HPE NonStop iTP WebServer can cause memory corruption and system shutdown.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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