How severe is CVE-2020-10858?

CVE-2020-10858 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-10858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10858?

CVE-2020-10858 affects Zulip Zulip Desktop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10858?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-10858 published?

CVE-2020-10858 was published on 2021-02-05 and last updated on 2026-06-17.

CVE-2020-10858

CVE-2020-10858 is a medium-severity vulnerability in Zulip Zulip Desktop with a CVSS 3.x base score of 5.3. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Zulip Zulip Desktop
Published: 2021-02-05
Last modified: 2026-06-17

Description

Zulip Desktop before 5.0.0 allows attackers to perform recording via the webcam and microphone due to a missing permission request handler.

Frequently asked questions

What is CVE-2020-10858?: Zulip Desktop before 5.0.0 allows attackers to perform recording via the webcam and microphone due to a missing permission request handler.
How severe is CVE-2020-10858?: CVE-2020-10858 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-10858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10858?: CVE-2020-10858 affects Zulip Zulip Desktop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-10858 published?: CVE-2020-10858 was published on 2021-02-05 and last updated on 2026-06-17.

References

https://blog.zulip.com/2020/04/01/zulip-desktop-5-0-0-security-release/

Affected products (1)

cpe:2.3:a:zulip:zulip_desktop:*:*:*:*:*:*:*:*

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