How severe is CVE-2026-42835?

CVE-2026-42835 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-42835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42835?

CVE-2026-42835 affects Microsoft Teams. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42835?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42835 have an EU (EUVD) identifier?

Yes. CVE-2026-42835 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35535.

When was CVE-2026-42835 published?

CVE-2026-42835 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-42835

CVE-2026-42835 is a high-severity vulnerability in Microsoft Teams with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35535
Weakness: CWE-74
Affected product: Microsoft Teams
Published: 2026-06-09
Last modified: 2026-06-17

Description

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

Frequently asked questions

What is CVE-2026-42835?: Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.
How severe is CVE-2026-42835?: CVE-2026-42835 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-42835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42835?: CVE-2026-42835 affects Microsoft Teams. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42835?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42835 have an EU (EUVD) identifier?: Yes. CVE-2026-42835 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35535.
When was CVE-2026-42835 published?: CVE-2026-42835 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42835

Affected products (1)

cpe:2.3:a:microsoft:teams:*:*:*:*:*:android:*:*

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