In Mimecast Incydr before 2.6.0, arbitrary file access can occur.

published 2026-06-05 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-34777

cvss: 4.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits: 0; none known

Patch / fix

fixed in 1

Mimecast Incydr 2.6.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-06-05)

Exploit prediction

0.09% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.5	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected products

Mimecast Incydr

Classification

Weakness

CWE-732 Incorrect Permission Assignment for Critical Resource

References

mimecastsupport.zendesk.com /hc/en-us/articles/42665910976659-Insider-risk-agent-release-notes#h_01JVT9C0KZWRTATSB2TFFS4Q51

Sources

CVE List CVE-2026-50590
NVD CVE-2026-50590

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