What is CVE-2020-35664?

CVE-2020-35664 is a medium-severity vulnerability in Acronis Cyber Protect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-02-22.

How severe is CVE-2020-35664?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Acronis Cyber Protect

CVE-2020-35664

An issue was discovered in Acronis Cyber Protect before 15 Update 1 build 26172. There is cross-site scripting (XSS) in the console.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-02-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Acronis Cyber Protect — versions 15

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.acronis.com (Vendor Advisory)
dl.managed-protection.com/u/cyberprotect/rn/15/user/en-US/AcronisCyberProtect15… (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2020-35664?: CVE-2020-35664 is a medium-severity vulnerability in Acronis Cyber Protect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-02-22.
How severe is CVE-2020-35664?: Medium severity. CVSS v3 base score is 6.1 out of 10.