How severe is CVE-2021-27574?

CVE-2021-27574 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-27574 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-2021-27574?

CVE-2021-27574 affects Remotemouse Emote Remote Mouse. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27574?

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.

When was CVE-2021-27574 published?

CVE-2021-27574 was published on 2021-05-07 and last updated on 2026-06-17.

CVE-2021-27574

CVE-2021-27574 is a high-severity vulnerability in Remotemouse Emote Remote Mouse 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-319.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Remotemouse Emote Remote Mouse
Published: 2021-05-07
Last modified: 2026-06-17

Description

An issue was discovered in Emote Remote Mouse through 4.0.0.0. It uses cleartext HTTP to check, and request, updates. Thus, attackers can machine-in-the-middle a victim to download a malicious binary in place of the real update, with no SSL errors or warnings.

Frequently asked questions

What is CVE-2021-27574?: An issue was discovered in Emote Remote Mouse through 4.0.0.0. It uses cleartext HTTP to check, and request, updates. Thus, attackers can machine-in-the-middle a victim to download a malicious binary in place of the real update, with no SSL errors or warnings.
How severe is CVE-2021-27574?: CVE-2021-27574 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-27574 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-2021-27574?: CVE-2021-27574 affects Remotemouse Emote Remote Mouse. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27574?: 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.
When was CVE-2021-27574 published?: CVE-2021-27574 was published on 2021-05-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:remotemouse:emote_remote_mouse:*:*:*:*:*:*:*:*

More vulnerabilities in Remotemouse Emote Remote Mouse

CVE-2021-27573 — Critical (CVSS 9.8): An issue was discovered in Emote Remote Mouse through 4.0.0.0. Remote unauthenticated users can execute arbitrary code…
CVE-2021-27572 — High (CVSS 8.1): An issue was discovered in Emote Remote Mouse through 4.0.0.0. Authentication Bypass can occur via Packet Replay.…
CVE-2021-27571 — Medium (CVSS 5.3): An issue was discovered in Emote Remote Mouse through 4.0.0.0. Attackers can retrieve recently used and running…
CVE-2021-27570 — Medium (CVSS 5.3): An issue was discovered in Emote Remote Mouse through 3.015. Attackers can close any running process by sending the…
CVE-2021-27569 — Medium (CVSS 5.3): An issue was discovered in Emote Remote Mouse through 4.0.0.0. Attackers can maximize or minimize the window of a…

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