HOMEVULNERABILITIESCVE-2020-13776
MEDIUM

CVE-2020-13776

CWE-269Published: June 3, 2020· Updated: Jun 17, 2026

6.7
CVSS v3.1

Official Description

systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082.

NVD Source

Technical Analysis

CVE-2020-13776 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.7.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Fedora1 product(s)
fedora
netapp2 product(s)
active iq unified managersolidfire \& hci management node
systemd_project1 product(s)
systemd
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://github.com/systemd/systemd/issues/15985
PATCHhttps://github.com/systemd/systemd/issues/15985
ADVISORYhttps://security.netapp.com/advisory/ntap-20200611-0003/
ADVISORYhttps://security.netapp.com/advisory/ntap-20200611-0003/

All References (6)

→
https://github.com/systemd/systemd/issues/15985Issue Tracking · Patch · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IYGLFEKG45EYBJ7TPQMLWROWPTZBEU63/
→
https://security.netapp.com/advisory/ntap-20200611-0003/Third Party Advisory
→
https://github.com/systemd/systemd/issues/15985Issue Tracking · Patch · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IYGLFEKG45EYBJ7TPQMLWROWPTZBEU63/
→
https://security.netapp.com/advisory/ntap-20200611-0003/Third Party Advisory

Quick Facts

CVE IDCVE-2020-13776
CVSS Score6.7 / 10
SeverityMEDIUM
WeaknessCWE-269
CISA KEVNo
Affected3 vendor(s)
PublishedJun 3, 2020

Related CVEs (CWE-269)

CVE-2025-0505
10.0
CVE-2024-6240
10.0
CVE-2018-4310
10.0
CVE-2021-1388
10.0
CVE-2022-24783
10.0
CVE-2026-31852
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-13776 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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