Unauthenticated XML External Entity Injection in AOS-8 Instant allows Denial of Service
A vulnerability in the XML handling component of AOS-8 DHCP services could allow an unauthenticated remote attacker to trigger a denial-of-service condition. Successful exploitation could allow an attacker to cause excessive resource consumption upon user interaction, leading to service disruption or reduced availability of the affected system. NOTE: This vulnerability only impacts Access Points running AOS Instant 8.x.x.x
- Published
- May 12, 2026
- Updated
- Aug 12, 2026
- EPSS
- 0.3% · 16th percentile
- CWE
- CWE-776
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · hpe
- 5.3
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| arubanetworks | arubaos | cpe:2.3:o:arubanetworks:arubaos |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- arubanetworks arubaos6.4.0.0 and later · up to 6.5.4.24 inclusive
- arubanetworks arubaos8.4.0.0 and later · before 8.10.0.22
- arubanetworks arubaos8.11.0.0 and later · before 8.12.0.7
- arubanetworks arubaos8.13.0.0 and later · before 8.13.1.2
Versions reported by the vendor
Affected version ranges reported by the assigning authority (hpe). Independent of NVD's CPE analysis and usually ahead of it.
Hewlett Packard Enterprise (HPE) ArubaOS (AOS)
- 8.13.0.0 and later · up to and including 8.13.1.1affected · semver
- 8.12.0.0 and later · up to and including 8.12.0.6affected · semver
- 8.10.0.0 and later · up to and including 8.10.0.21affected · semver
Same product
arubanetworks: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-24633There are multiple buffer overflow vulnerabilities that could lead to unauthenticated remote code execution by sending especially crafted pa41Plan
- CVE-2018-7081A remote code execution vulnerability is present in network-listening components in some versions of ArubaOS.41Plan
- CVE-2023-45616There is a buffer overflow vulnerability in the underlying AirWave client service that could lead to unauthenticated remote code execution b40Plan
- CVE-2023-45615There are buffer overflow vulnerabilities in the underlying CLI service that could lead to unauthenticated remote code execution by sending 40Plan
- CVE-2023-45614There are buffer overflow vulnerabilities in the underlying CLI service that could lead to unauthenticated remote code execution by sending 40Plan
- CVE-2023-35982Unauthenticated Buffer Overflow Vulnerabilities in Services Accessed by the PAPI Protocol40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Nicholas StarkeAruba Threat Labsreporter
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-776 · Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.