How severe is CVE-2020-13376?

CVE-2020-13376 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-13376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13376?

CVE-2020-13376 affects Securenvoy Securmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13376?

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-2020-13376 published?

CVE-2020-13376 was published on 2020-08-07 and last updated on 2026-06-17.

CVE-2020-13376

CVE-2020-13376 is a critical-severity vulnerability in Securenvoy Securmail with a CVSS 3.x base score of 9.0. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 9.3
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Securenvoy Securmail
Published: 2020-08-07
Last modified: 2026-06-17

Description

SecurEnvoy SecurMail 9.3.503 allows attackers to upload executable files and achieve OS command execution via a crafted SecurEnvoyReply cookie.

Frequently asked questions

What is CVE-2020-13376?: SecurEnvoy SecurMail 9.3.503 allows attackers to upload executable files and achieve OS command execution via a crafted SecurEnvoyReply cookie.
How severe is CVE-2020-13376?: CVE-2020-13376 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-13376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13376?: CVE-2020-13376 affects Securenvoy Securmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13376?: 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-2020-13376 published?: CVE-2020-13376 was published on 2020-08-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:securenvoy:securmail:9.3.503:*:*:*:*:*:*:*

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