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CVE-2020-36519

20
FAUCET Score

CVE-2020-36519 describes a vulnerability in Mimecast Email Security versions prior to 2020-01-10, where an authenticated administrator could spoof any customer domain within the Mimecast grid and bypass DMARC alignment through misuse of the address rewrite feature. Rated Medium with a CVSS score of 4.9, this vulnerability requires high privileges (PR:H) and has a high impact on integrity (I:H), but no impact on confidentiality or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating a low current exploitation risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 2020-01-10CPE matchmatch criteria
cpe:2.3:a:mimecast:email_security:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 54th percentile among its peer group of 3,565 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

wesleyk.me / 2020/01/10/my-first-vulnerability-mimecast-sender-address-verification
ExploitThird Party Advisory