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HPE Networking EUVDEUVD-2026-108391

| CVE-2026-79891 HIGH
Buffer Overflow (CWE-119)
2026-10-22 security-alert@hpe.com GHSA-57fx-3867-35c9
8.1
CVSS 3.1 · Vendor: hpe
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach exposed HPE network service
  2. Exploit
    Satisfy high-complexity trigger condition
  3. Impact
    Disclose sensitive information from target

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Per the supplied CVSS vector, exploitation is remote (AV:N), requires no privileges (PR:N, unauthenticated), and needs no user interaction (UI:N), but carries high attack complexity (AC:H) meaning success depends on a specific condition outside the attacker's direct control; the exact prerequisite is not described in the available sources because no description was provided. The practical limiting factor is this AC:H condition - without the HPE advisory detailing the affected product, feature, versions, and configuration, the precise prerequisite cannot be named. Exploitation also requires network reachability of the affected HPE networking product.

Impact

Signals are mixed and the dataset is thin. The CVSS 3.1 base score is 8.1 (High) driven by a network vector with no privileges and no user interaction (AV:N/PR:N/UI:N) and full C:H/I:H/A:H impact, but tempered by high attack complexity (AC:H), which means a successful attack depends on a condition outside the attacker's routine control. There is no CISA KEV listing, no EPSS probability supplied, no SSVC automatable/technical-impact decision data, and no public exploit or PoC reference in the input, so exploitation is: no public exploit identified at time of analysis. The vuln.today decision label is 'this_week', indicating prioritized but non-emergency handling. A notable internal conflict: the only content signal is the 'Information Disclosure' tag, which points to a confidentiality-only impact, yet the supplied CVSS vector asserts I:H and A:H - these cannot both be fully correct, so the true impact scope should be verified against the HPE advisory. No description was provided, so the mechanism, affected product, and affected versions are unconfirmed. Net: treat as a genuine high-severity networking flaw worth patching this week, but the AC:H rating and absence of any exploitation evidence argue against emergency status.

Exploit ScenarioDerived

A remote, unauthenticated attacker reaches an exposed HPE networking product over the network and, after satisfying a non-trivial precondition implied by the high attack complexity, triggers the flaw to disclose sensitive information (and, per the supplied vector, potentially affect integrity and availability). No public exploit or PoC was identified in the available data, and the specific trigger is not described in the available sources.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 22, 2026

Information disclosure in HPE networking products, tracked as CVE-2026-79891, can expose sensitive data to remote unauthenticated attackers when a high-complexity condition outside their direct control is satisfied; the CVE record is scored 8.1, while the independent assessment limits impact to confidentiality only. The affected product family, versions, feature, and exact prerequisite are not exposed in the supplied data, and the only vendor pointer is HPE security bulletin hpesbnw05162en_us. No public exploit was identified at time of analysis, and no CISA KEV status is present.

RemediationAI

No vendor-released patch version is identified in the supplied data, so the HPE security bulletin at https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05162en_us&docLocale=en_US is the only authoritative source for the affected version matrix and fixed releases. Because the affected product, feature, and versions are not disclosed in the supplied evidence, no exact upgrade target or feature-level workaround can be cited without consulting that advisory. If the bulletin confirms no fixed release, limit network access to the affected HPE networking component to trusted management networks and monitor for anomalous information retrieval; this reduces exposure but may block legitimate remote users. Do not apply generic configuration changes until the affected feature and prerequisites are confirmed against the HPE advisory.

Affected VersionsENISA

Unknown product 8.12.0.0 ≤8.13.3.0
Unknown product 8.10.0.0 ≤8.10.0.23

Affected Packages

euvd unknown_product no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The supplied data identifies an HPE networking product documented in HPE security bulletin hpesbnw05162en_us, but it provides no CPE strings, no CWE classification, no affected feature name, and no version ranges. The root-cause class is therefore unconfirmed; the only classification available is Information Disclosure, which aligns with the independently assessed confidentiality-only impact. The CVE record uses CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, while the independent assessment narrows the vector to CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N. That means exploitation is network-reachable, unauthenticated, and requires no user interaction, but is gated by a high-complexity condition outside the attacker's direct control; the exact condition is not described in the available sources. Network reachability of the affected HPE networking component is required.

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Severity by source

Vendor (hpe) PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 5.9 MEDIUM

AV:N/PR:N/UI:N and AC:H kept from the input; the only content signal ('Information Disclosure') indicates confidentiality-only impact, so I/A set to N pending vendor confirmation.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (hpe).

CVSS VectorVendor: hpe

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

No description provided

Executive ViewAI

Why It Matters

HPE networking products contain a high-severity information disclosure flaw (CVE-2026-79891) that could allow remote unauthenticated attackers to access sensitive data, though exploitation requires a high-complexity condition outside an attacker's direct control. No patch or public exploit is currently available, so the primary risk is potential data leakage that could affect confidentiality of network information. Leadership should prioritize identifying and isolating affected HPE networking devices while monitoring for vendor updates.

Business Impact: High
Compensating Controls

No vendor patch is currently available. Interim mitigations include restricting network access to affected HPE devices through segmentation and firewall rules, disabling non-essential services, and monitoring for unusual data access patterns. Follow HPE security bulletin hpesbnw05162en_us for updated guidance.

Threat Intelligence Overview

EPSS Score
0.3%
Top 84% exploitable
Prevalence
Medium
HPE enterprise networking product, common but not ubiquitous footprint
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

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