CVE-2026-1340: Ivanti Endpoint Manager Mobile (EPMM)

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

Yes, if you run Ivanti Endpoint Manager Mobile (EPMM). CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-04-08, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-04-11; treat that as the outer limit, not the target.
EPSS 98.6%, percentile 99.9: FIRST’s model estimates a 98.6% chance of exploitation activity in the next 30 days, higher than 99.9% of all scored CVEs (very high). EPSS is a probability, not a verdict.
Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
Editorial verdict: Act now. Ivanti EPMM Zero-Day RCE: CVE-2026-1281 and CVE-2026-1340 — On-premises Ivanti EPMM was open to unauthenticated remote command execution, exploited before disclosure and with a public PoC a day later; patch, confirm the RPM survived any later upgrade, and hunt for compromise.

What it is

A code injection in Ivanti Endpoint Manager Mobile allowing attackers to achieve unauthenticated remote code execution.

CISA’s summary

Ivanti Endpoint Manager Mobile (EPMM) contains a code injection vulnerability that could allow attackers to achieve unauthenticated remote code execution.

Weakness type: CWE-94.

Product: Ivanti Endpoint Manager Mobile (EPMM) · Assigned by: ivanti · Published: 2026-01-29

Affected and fixed versions

Vendor	Product	Affected versions (per CVE record)
Ivanti	Endpoint Manager Mobile	see vendor advisory

Severity scores

Scored by	CVSS	Score	Vector
ivanti	3.1	9.8 Critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: none
Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

CISA KEV: added 2026-04-08; federal due date 2026-04-11. Known ransomware use: Unknown.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
FIRST EPSS (model of 2026-10-21): 98.64% probability of exploitation activity in the next 30 days; percentile 99.9.

Timeline

2026-01-29 — CVE record published by ivanti
2026-01-29 — erroneo.us brief: Ivanti EPMM Zero-Day RCE: CVE-2026-1281 and CVE-2026-1340
2026-04-08 — Added to CISA’s Known Exploited Vulnerabilities catalog
2026-04-09 — CVE record last updated
2026-04-11 — CISA remediation deadline for US federal agencies

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Other references from the CVE record and advisory

forums.ivanti.com forums.ivanti.com

All exploited Ivanti vulnerabilities · Today’s Security Digest