How severe is CVE-2021-44026?

CVE-2021-44026 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2021-44026 being actively exploited?

Yes. CVE-2021-44026 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-22, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-44026?

CVE-2021-44026 primarily affects Roundcube Webmail. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-44026?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-44026 have an EU (EUVD) identifier?

Yes. CVE-2021-44026 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-30885. It is also flagged as exploited in the EUVD (since 2023-06-22).

When was CVE-2021-44026 published?

CVE-2021-44026 was published on 2021-11-19 and last updated on 2026-06-17.

CVE-2021-44026

CVE-2021-44026 is a critical-severity vulnerability in Roundcube Webmail with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-06-22). The underlying weakness is classified as CWE-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 43% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-06-22)
EU (EUVD) id: EUVD-2021-30885
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-06-22)
Weakness: CWE-89
Affected product: Roundcube Webmail
Published: 2021-11-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-44026?: 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.
How severe is CVE-2021-44026?: CVE-2021-44026 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2021-44026 being actively exploited?: Yes. CVE-2021-44026 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-06-22, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-44026?: CVE-2021-44026 primarily affects Roundcube Webmail. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-44026?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-44026 have an EU (EUVD) identifier?: Yes. CVE-2021-44026 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-30885. It is also flagged as exploited in the EUVD (since 2023-06-22).
When was CVE-2021-44026 published?: CVE-2021-44026 was published on 2021-11-19 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

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