How severe is CVE-2021-23921?

CVE-2021-23921 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-23921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23921?

CVE-2021-23921 affects Devolutions Devolutions Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23921?

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

When was CVE-2021-23921 published?

CVE-2021-23921 was published on 2021-04-01 and last updated on 2026-06-17.

CVE-2021-23921

CVE-2021-23921 is a critical-severity vulnerability in Devolutions Devolutions Server with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Devolutions Devolutions Server
Published: 2021-04-01
Last modified: 2026-06-17

Description

An issue was discovered in Devolutions Server before 2020.3. There is broken access control on Password List entry elements.

Frequently asked questions

What is CVE-2021-23921?: An issue was discovered in Devolutions Server before 2020.3. There is broken access control on Password List entry elements.
How severe is CVE-2021-23921?: CVE-2021-23921 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-23921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23921?: CVE-2021-23921 affects Devolutions Devolutions Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-23921 published?: CVE-2021-23921 was published on 2021-04-01 and last updated on 2026-06-17.

References

https://devolutions.net/security/advisories/devo-2021-0002

Affected products (1)

cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*

More vulnerabilities in Devolutions Devolutions Server

CVE-2026-3224 — Critical (CVSS 9.8): Authentication bypass in the Microsoft Entra ID (Azure AD) authentication mode in Devolutions Server 2025.3.15.0 and…
CVE-2026-3204 — Critical (CVSS 9.8): Improper input validation in the error message page in Devolutions Server 2025.3.16 and earlier allows remote…
CVE-2026-3130 — Critical (CVSS 9.8): Improper Enforcement of Behavioral Controls in Devolutions Server 2025.3.15 and earlier allows an authenticated…
CVE-2026-0610 — Critical (CVSS 9.8): SQL Injection vulnerability in remote-sessions in Devolutions Server.This issue affects Devolutions Server 2025.3.1…
CVE-2024-2921 — Critical (CVSS 9.8): Improper access control in PAM vault permissions in Devolutions Server 2024.1.10.0 and earlier allows an authenticated…
CVE-2026-14536 — High (CVSS 8.8): Improper enforcement of a mandatory multi-factor authentication policy in Devolutions Server 2026.2.9.0 allows an…

All CVEs affecting Devolutions Devolutions Server →