Multiple vulnerabilities in Mattermost Desktop App (August 18, 2026)

unknownCVE-2026-75587

Multiple vulnerabilities were discovered in Mattermost Desktop App. They allow an attacker to cause data confidentiality compromise and an unspecified security issue by the vendor.

CSIRTS triage

vendor: Mattermost product: Mattermost Desktop App Information disclosureOther

What: Multiple vulnerabilities allow data confidentiality compromise and an unspecified security issue.
Who is affected: Users running Mattermost Desktop App.
Urgency: Unknown severity; data compromise is serious but exact impact and exploitation details are not specified.
Action: Update Mattermost Desktop App to a patched version addressing CVE-2026-75587; check advisory for detailed impact.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Mattermost Desktop App

Get an email when a new Mattermost Desktop App advisory drops — max one per day, one-click unsubscribe.

Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-08-18
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1040/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-755870.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-75587	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.