Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.35% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-76676High confidence
Unauthenticated Buffer Overflow Vulnerabilities lead to Remote Code Execution in EdgeConnect SD-WAN Gateways
Hewlett Packard Enterprise (HPE) · EdgeConnect SD-WAN Gateways
8.8HighCVSS 3.1
Within 7 days
Patch availableHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Hewlett Packard Enterprise (HPE) EdgeConnect SD-WAN Gateways and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
HPESBNW05135 · CSAF 2.0 · revision 1 · finalHPE NetworkingUnauthenticated Buffer Overflow Vulnerabilities lead to Remote Code Execution in EdgeConnect SD-WAN Gateways
The vendor explicitly identifies these products as affected by this CVE.
- HPE Networking EdgeConnect SD-WAN Gateways
- Summary
- Buffer overflow vulnerabilities exist in the underlying operating system of EdgeConnect SD-WAN Gateways that could allow an unauthenticated adjacent attacker to execute arbitrary code if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary code as a privileged user on the underlying operating system leading to complete system compromise.
- Remediation
- To address the vulnerabilities described in the Details Section, HPE Networking recommends upgrading the HPE Networking EdgeConnect SD-WAN Gateways to the following software versions (as applicable): - ECOS 9.7.1.0 and above - ECOS 9.6.4.0 and above - ECOS 9.5.9.0 and above - ECOS 9.4.9.0 and above IMPORTANT: The HPE Networking EdgeConnect SD-WAN Orchestrator software version must be greater than or equal to the ECOS software version running on any HPE Networking EdgeConnect SD-WAN Gateways. Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at: https://networkingsupport.hpe.com NOTE: Product software versions that have reached End of Maintenance (EoM) are presumed to be affected by the vulnerabilities unless explicitly stated otherwise and are not covered by this security advisory. For deployments running software versions that are past End of Support (EoS), HPE Networking has not assessed exposure to the vulnerabilities referenced in this advisory. As a result, such installations should be considered potentially impacted by the listed CVE. Customers are strongly encouraged to upgrade to a supported software release to ensure proper evaluation and remediation. For more details on HPE Networking's End-of-Support policy, please visit: https://arubanetworking.hpe.com/techdocs/sdwan-PDFs/docs/eula/EC_LifecyclePolicy_latest.pdf
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available01
What, why and how
Buffer overflow vulnerabilities exist in the underlying operating system of EdgeConnect SD-WAN Gateways that could allow an unauthenticated adjacent attacker to execute arbitrary code if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary code as a privileged user on the underlying operating system leading to complete system compromise.
What
Buffer overflow vulnerabilities exist in the underlying operating system of EdgeConnect SD-WAN Gateways that could allow an unauthenticated adjacent attacker to execute arbitrary code if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary code as a privileged user on the underlying operating system leading to complete system compromise.
Why
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
How
An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
What
Buffer overflow vulnerabilities exist in the underlying operating system of EdgeConnect SD-WAN Gateways that could allow an unauthenticated adjacent attacker to execute arbitrary code if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to execute arbitrary code as a privileged user on the underlying operating system leading to complete system compromise.
Why
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
How
An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- an adjacent network → Stack-based Buffer Overflow → execute code or commands in the affected security context
- Attack surface
- Adjacent
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-121 ↗
CWE-121: Stack-based Buffer Overflow. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Patch available
- Action
- To address the vulnerabilities described in the Details Section, HPE Networking recommends upgrading the HPE Networking EdgeConnect SD-WAN Gateways to the following software versions (as applicable): - ECOS 9.7.1.0 and above - ECOS 9.6.4.0 and above - ECOS 9.5.9.0 and above - ECOS 9.4.9.0 and above IMPORTANT: The HPE Networking EdgeConnect SD-WAN Orchestrator software version must be greater than or equal to the ECOS software version running on any HPE Networking EdgeConnect SD-WAN Gateways. Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at: https://networkingsupport.hpe.com NOTE: Product software versions that have reached End of Maintenance (EoM) are presumed to be affected by the vulnerabilities unless explicitly stated otherwise and are not covered by this security advisory. For deployments running software versions that are past End of Support (EoS), HPE Networking has not assessed exposure to the vulnerabilities referenced in this advisory. As a result, such installations should be considered potentially impacted by the listed CVE. Customers are strongly encouraged to upgrade to a supported software release to ensure proper evaluation and remediation. For more details on HPE Networking's End-of-Support policy, please visit: https://arubanetworking.hpe.com/techdocs/sdwan-PDFs/docs/eula/EC_LifecyclePolicy_latest.pdf
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 15 Sept 2026 · Last source change 21 Sept 2026, 19:58 UTC · CWE-121 · Stack-based Buffer Overflow
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-09-16
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-79202
Product sourceVendor CSAF · HPE Networking
Remediation sourceVendor CSAF · HPE Networking
CWE sourceCISA ADP
NVD statusNVD enriched
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: support.hpe.com/docDisplay?docId=hpesbnw05135en_us&docLocale=en_US.security-alert@hpe.com ↗
- Before
- no authoritative guidance recorded
- After
- vendor advisory: support.hpe.com/docDisplay?docId=hpesbnw05135en_us&docLocale=en_US
- ENISA EUVD mappingEUVD-2026-79202 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-79202"}
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
- Affected versionsThe structured affected or fixed version information changed.HPE Networking ↗
- Before
- EdgeConnect SD-WAN Gateways: 9.7.0.0 ≤ 9.7.0.0, 9.6.0.0 ≤ 9.6.3.1, 9.5.0.0 ≤ 9.5.8.1, 9.4.0.0 ≤ 9.4.8.2 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- EdgeConnect SD-WAN Gateways: 9.7.0.0 ≤ 9.7.0.0, 9.6.0.0 ≤ 9.6.3.1, 9.5.0.0 ≤ 9.5.8.1, 9.4.0.0 ≤ 9.4.8.2 · Fixed: To address the vulnerabilities described in the Details Section, HPE Networking recommends upgrading the HPE Networking EdgeConnect SD-WAN Gateways to the following software versions (as applicable): - ECOS 9.7.1.0 and above - ECOS 9.6.4.0 and above - ECOS 9.5.9.0 and above - ECOS 9.4.9.0 and above IMPORTANT: The HPE Networking EdgeConnect SD-WAN Orchestrator software version must be greater than or equal to the ECOS software version running on any HPE Networking EdgeConnect SD-WAN Gateways. Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at: https://networkingsupport.hpe.com NOTE: Product software versions that have reached End of Maintenance (EoM) are presumed to be affected by the vulnerabilities unless explicitly stated otherwise and are not covered by this security advisory. For deployments running software versions that are past End of Support (EoS), HPE Networking has not assessed exposure to the vulnerabilities referenced in this advisory. As a result, such installations should be considered potentially impacted by the listed CVE. Customers are strongly encouraged to upgrade to a supported software release to ensure proper evaluation and remediation. For more details on HPE Networking's End-of-Support policy, please visit: https://arubanetworking.hpe.com/techdocs/sdwan-PDFs/docs/eula/EC_LifecyclePolicy_latest.pdf
- Remediation statusRemediation status changed from Awaiting fix to Patch available.HPE Networking ↗
- Before
- Awaiting fix
- After
- Patch available
CVE published
Fixed release recorded from official guidance
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.