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CVE-2020-16117

17
FAUCET Score

CVE-2020-16117 is a NULL pointer dereference vulnerability in GNOME evolution-data-server versions prior to 3.35.91, affecting Debian and GNOME distributions. A remote, unauthenticated attacker can crash the mail client by sending a malformed CAPABILITY line during a connection attempt. This vulnerability has a CVSS score of 5.9 (Medium), indicating a high availability impact with high attack complexity and no user interaction required. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.35.91CPE matchmatch criteria
cpe:2.3:a:gnome:evolution-data-server:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 67th percentile among its peer group of 19,956 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: evolution-0:3.28.5-16.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: evolution-data-server-0:3.28.5-15.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: evolution-ews-0:3.28.5-10.el8
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: evolution-data-server

Vendor Advisories (1)

redhatCVE-2020-16117Low

evolution-data-server: NULL pointer dereference related to imapx_free_capability and imapx_connect_to_server

Jul 30, 2020

References

gitlab.gnome.org / GNOME/evolution-data-server/-/commit/2cc39592b532cf0dc994fd3694b8e6bf924c9ab5
PatchVendor Advisory
gitlab.gnome.org / GNOME/evolution-data-server/-/commit/627c3cdbfd077e59aa288c85ff8272950577f1d7
Release NotesVendor Advisory
gitlab.gnome.org / GNOME/evolution-data-server/-/issues/189
ExploitVendor Advisory
lists.debian.org / debian-lts-announce/2020/08/msg00005.html
Third Party Advisory