Weak Password Recovery in H3C NX15 Administrator Endpoint

CVE-2026-15479 exposes a critical weakness in H3C NX15 V100R017's administrator password modification functionality. The vulnerability exists in the /api/login/modify endpoint's change_passwd function, where insufficient validation of the newPass parameter allows attackers to set weak passwords that can be easily recovered or cracked. This is particularly dangerous because it affects administrative credentials—the highest-privilege accounts in network infrastructure. Organizations running H3C NX15 devices are directly at risk, especially those with internet-facing management interfaces. Since the exploit has been publicly disclosed, the window for opportunistic attacks is open.

While this CVE lacks mapped MITRE ATT&CK techniques, Casky's Claude-powered platform would detect the attack patterns associated with this vulnerability through its 754 security skills by identifying behavioral indicators of Credential Access and Defense Evasion tactics. Practitioners using Casky would observe findings related to suspicious API calls to /api/login/modify with password parameters that fail strength validation checks, unusual administrative account modifications, or authentication patterns inconsistent with legitimate password changes. Claude's extended reasoning would correlate weak password implementations with post-compromise persistence techniques—once an attacker sets a weak admin password, they establish a backdoor with minimal detection risk. Security teams should prioritize patching H3C NX15 devices and implementing API gateway protections that enforce password complexity policies at the network boundary.