Account Takeover via Predictable SSO Ticket Generation

published 2026-06-23 4 mo ago modified 2026-06-24 4 mo ago also EUVD-2026-38423

cvss: 9.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits: 0; none known

In ManageEngine ADSelfService Plus, RecoveryManager Plus, M365 Manager Plus, and ADAudit Plus, the SSO tickets generated to authenticate that session could be predicted by an unauthenticated user, leading to account takeover.

Patch / fix

fixed in 4

zohocorp manageengine_adselfservice_plus 6529
zohocorp manageengine_recovery_manager_plus 6321
zohocorp manageengine_m365_manager_plus 4817
zohocorp manageengine_adaudit_plus 8703

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 4 mo ago (2026-06-24)

Exploit prediction

2.52% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.0	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

zohocorp manageengine_adselfservice_plus
zohocorp manageengine_recovery_manager_plus
zohocorp manageengine_m365_manager_plus
zohocorp manageengine_adaudit_plus

Classification

Weakness

CWE-340 Generation of Predictable Numbers or Identifiers
CWE-330 Use of Insufficiently Random Values
CWE-287 Improper Authentication

References

manageengine.com /products/self-service-password/advisory/CVE-2026-11374.html

Sources

CVE List CVE-2026-11374
NVD CVE-2026-11374

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