Ivanti Sentry critical flaws patched (CVE-2026-10520, CVE-2026-10523); September 2026 Ivanti updates also cover Endpoint Manager Mobile and Neurons for ITSM

Ivanti Sentry (formerly MobileIron Sentry) contains an OS command injection flaw (CWE-78) that lets a remote, unauthenticated attacker execute operating-system commands with root privileges on the appliance. Exploitation succeeds when the Sentry appliance is in an unmanaged state with its endpoints externally reachable; deployments that enforce mTLS with EPMM or restrict HTTPS access through Ivanti Neurons for MDM keep the interfaces inaccessible to external actors. A successful attacker gains root-level remote code execution, giving full control of the gateway that fronts an organization's mobile device management (MDM) infrastructure. Organizations running unmanaged, internet-exposed Ivanti/MobileIron Sentry appliances are affected. The flaw is being exploited in the wild — CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-11 (formal CVSS scoring is still pending), EPSS puts the 30-day exploitation probability at 99.9%, no public proof-of-concept is known, and ransomware use is undetermined.

Do: Inventory all Ivanti/MobileIron Sentry appliances and determine whether they are unmanaged with externally reachable endpoints; apply Ivanti's mitigations in line with CISA KEV and BOD 26-04 timelines, and where a patch is not yet in place, restrict access by enabling mTLS with EPMM or limiting HTTPS access through Ivanti Neurons for MDM. Monitor Ivanti's advisories for fixed versions and review exposed appliances for signs of compromise.

CVE-2026-10523 is an authentication bypass (CWE-288) in Ivanti Sentry, the gateway component formerly known as MobileIron Sentry, affecting standalone deployments before the R10.5.2, R10.6.2, and R10.7.1 releases. A remote, unauthenticated attacker can exploit it over the network with no credentials, no user interaction, and no special conditions, creating arbitrary administrative accounts on the affected gateway. The attacker thereby obtains full administrative control of Sentry, which in most deployments sits at the network edge handling mobile-device (MDM/UEM) traffic for organizations using Ivanti's mobility management stack. Any organization running an affected standalone Sentry version is exposed, with internet-facing instances at greatest risk. Exploitation has not yet been confirmed in the wild (no public PoC, not in CISA KEV), but the high EPSS score of 51.9% (99th percentile) indicates a strong likelihood of exploitation within the next 30 days.

Do: Upgrade standalone Ivanti Sentry to R10.5.2, R10.6.2, or R10.7.1 depending on your current release branch. Until patched, restrict network exposure of Sentry (especially direct internet access) and review the administrative account list for unexpected admin accounts created without authorization. Given the critical severity and high EPSS, prioritize patching internet-facing instances first.

CVE-2026-18851 is a missing-authorization flaw (CWE-862) in Ivanti Endpoint Manager Mobile (EPMM) in which certain functionality fails to verify that an authenticated user is authorized to perform administrative actions. A remote attacker who already holds a valid low-privilege session can send crafted requests over the network, with no user interaction required, and escalate to administrator. From an admin position, the attacker gains full control of the mobile device management console, including access to managed-device data and the ability to alter or push configurations to enrolled devices. Organizations running EPMM versions before 12.10.0.0, 12.9.0.2, or 12.8.0.4 are affected. As of the advisory there is no known in-the-wild exploitation and no public proof-of-concept, it is not in CISA KEV (EPSS ~1.0%), and it was patched as part of a larger Ivanti batch covering EPMM, Neurons for ITSM and Sentry flaws enabling RCE and admin access.

Do: Upgrade EPMM to 12.10.0.0, 12.9.0.2, or 12.8.0.4 depending on the release branch in use, per Ivanti's advisory. Until patched, restrict EPMM console/API interfaces to trusted networks and review logs for authenticated users performing unexpected administrative actions. Because this fix ships in the same batch as other EPMM, Neurons for ITSM and Sentry patches, apply the full set of vendor updates rather than only this CVE.

CVE-2026-83527 is an authentication bypass (CWE-288) in Ivanti Sentry that allows a remote, unauthenticated attacker to gain administrative-level access to the appliance. It is triggered over the network with no prior privileges or user interaction, though the high-attack-complexity (AC:H) CVSS rating indicates exploitation depends on specific conditions rather than a trivially reliable path. A successful attacker obtains admin-level control of Sentry, the gateway component many organizations deploy alongside Ivanti EPMM/MobileIron for mobile device management, potentially exposing or disrupting device-management functions. Any organization running Ivanti Sentry on builds earlier than the fixed releases R10.8.2, R10.7.3, or R10.6.4 (depending on release line) is affected. No public proof-of-concept is known, the flaw is not in CISA's KEV catalog, and EPSS assigns a 1.5% probability of exploitation within 30 days, so active exploitation is not currently confirmed.

Do: Upgrade Ivanti Sentry to R10.8.2 (or R10.7.3 / R10.6.4 for the corresponding release line) as addressed in Ivanti's advisory AV26-897. Until patched, minimize Sentry's internet exposure to required management/enrollment traffic and review appliance logs for unexpected administrator logins. Ivanti EPMM and Neurons for ITSM administrators should also review the same advisory, which covers additional flaws in those products.