Unauthenticated XML External Entity Injection in AOS-8 Instant allows Denial of Service

published 2026-05-12 5 mo ago modified 2026-10-26 13 d ago also EUVD-2026-29738

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits: 0; none known

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

Patch / fix

fixed in 1

arubanetworks arubaos 8.10.0.22, 8.12.0.7, 8.13.1.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-12)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

Hewlett Packard Enterprise (HPE) ArubaOS (AOS)

Classification

Weakness

CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

support.hpe.com /hpesc/public/docDisplay?docId=hpesbnw05049en_us&docLocale=en_US
vendor-advisory

Sources

CVE List CVE-2026-23822
NVD CVE-2026-23822

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary