How severe is CVE-2020-26554?

CVE-2020-26554 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-26554 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26554?

CVE-2020-26554 affects Reddoxx Maildepot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26554?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-26554 published?

CVE-2020-26554 was published on 2020-11-18 and last updated on 2026-06-17.

CVE-2020-26554

CVE-2020-26554 is a medium-severity vulnerability in Reddoxx Maildepot with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Reddoxx Maildepot
Published: 2020-11-18
Last modified: 2026-06-17

Description

REDDOXX MailDepot 2033 (aka 2.3.3022) allows XSS via an incoming HTML e-mail message.

Frequently asked questions

What is CVE-2020-26554?: REDDOXX MailDepot 2033 (aka 2.3.3022) allows XSS via an incoming HTML e-mail message.
How severe is CVE-2020-26554?: CVE-2020-26554 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-26554 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26554?: CVE-2020-26554 affects Reddoxx Maildepot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26554?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-26554 published?: CVE-2020-26554 was published on 2020-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:reddoxx:maildepot:2033:*:*:*:*:*:*:*

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