CVE-2020-13529 — An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP...

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Cloud Backup…).
2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
3. Search available logs for exploit probes matching the vulnerability class (authentication), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-290 · Authentication Bypass by Spoofing

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 1.43%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Review authentication logs: logins without MFA, anomalous sessions and recently created accounts.

Timeline

What happened to this CVE, newest first.

• 2026
• Record published
  Oct 14, 2026
• Affected products added · systemd project/systemd, fedoraproject/fedora, netapp/active iq unified manager, netapp/cloud backup
  Oct 14, 2026 · NIST National Vulnerability Database
• CVSS changed · 6.1
  Oct 14, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 14, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 14, 2026 · Alertas do Telegram
• 2021
• CVE published
  May 10, 2021 · talos

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 14, 2026 – Oct 14, 2026
• 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

11 on the record

• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TM
  vendor-advisory, x_refsource_FEDORA, NIST National Vulnerability Database
• talosintelligence.com/vulnerability_reports/TALOS-2020-1142
  Exploit, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2021/09/07/3
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/html/ssa-398330.html
  NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2020-13529
  GitHub Security Advisories
• www.openwall.com/lists/oss-security/2021/08/17/3
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20210625-0005/
  Third Party Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/42TMJV
  GitHub Security Advisories
• github.com/advisories/GHSA-44p7-qpr4-rgvf
  GitHub Security Advisories
• security.gentoo.org/glsa/202107-48
  Third Party Advisory, vendor-advisory, x_refsource_GENTOO, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2021/08/04/2
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-54231 Abrt: unsanitized systemd journal content written to dump directory files enables content injection Jun 13, 2026
• High CVE-2026-54230 Abrt: event handler scripts follow symlinks when writing output files, allowing arbitrary file overwrites Jun 13, 2026
• Low CVE-2026-40228 Incorrect Resource Transfer Between Spheres in Systemd Project Systemd Apr 10, 2026
• High CVE-2026-40224 Incorrect Authorization in Systemd Project Systemd Apr 10, 2026
• Medium CVE-2026-40225 Incorrect Resource Transfer Between Spheres in Systemd Project Systemd Apr 10, 2026
• Medium CVE-2026-40227 In systemd 260 before 261, a local unprivileged user can trigger an assert via an IPC… Apr 10, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No CISA SSVC assessment.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-13529 is "An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP...", rated Medium. It affects Fedora (Fedoraproject); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.1 describes technical severity. EPSS 1.43% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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