How severe is CVE-2021-44026?

CVE-2021-44026 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-44026?

Affected package information for CVE-2021-44026 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2021-44026?

No fixed version has been published for CVE-2021-44026 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2021-44026 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2021-44026, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2021-44026?

CVE-2021-44026 has an EPSS (Exploit Prediction Scoring System) score of 72.5%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2021-44026 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2021-44026 (Roundcube Webmail SQL Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-06-22. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-07-13. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2021-44026?

CVE-2021-44026 is classified as SQL Injection (CWE-89). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-44026 published, and has it been updated?

CVE-2021-44026 was published on November 19, 2021 and was last updated on April 16, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-06-22 — agencies required to remediate by 2023-07-13

CVE-2021-44026

CRITICAL

Also known asBIT-roundcube-2021-44026

Published

Nov 19, 2021

Updated

Apr 16, 2026

Affected

0 pkgs

Patched

None yet

Exploits

2 known

EPSS Exploitation Probability

via FIRST.org ↗

72.5%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params.

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential …

cisa.govCISAJun 2023

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential …

github.comGithubNov 2023

Frequently Asked Questions

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params.

O3 Security · Impact-Aware SCA

Is CVE-2021-44026 in your stack?

O3 detects CVE-2021-44026 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

9.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

None

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

High

A:Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-89SQL Injection

Weaponization

No known public exploit tooling found.

OpenSSF Scorecard

Package health score

roundcubemail

6.1/10

Code-Review0/10

Maintained10/10

Branch-Protection1/10

Assessed Jun 1, 2026

Timeline

Disclosed

Nov 19, 2021

KEV added

Jun 22, 2023

First exploit

Jun 22, 2023

Last updated

Apr 16, 2026

Identifiers

CVE-2021-44026

BIT-roundcube-2021-44026

References

Advisorylists.debian.org Advisorylists.fedoraproject.org Advisorylists.fedoraproject.org Advisorydebian.org Fixbugs.debian.org Fixgithub.com Fixgithub.com Webcisa.gov

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