CVE-2021-36613

MEDIUMNVD 6.56.5—

6.5

Mikrotik RouterOs before stable 6.48.2 suffers from a memory corruption vulnerability in the ptp process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 76.1%
KEV: Not listed

Published

May 11, 2022

Last Modified

November 21, 2024

References (4)

cve@mitrehttp://seclists.org/fulldisclosure/2022/Jun/2
cve@mitrehttps://seclists.org/fulldisclosure/2021/Jul/0
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2022/Jun/2
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/fulldisclosure/2021/Jul/0

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-36613?

CVE-2021-36613 is a medium vulnerability published on May 11, 2022. Mikrotik RouterOs before stable 6.48.2 suffers from a memory corruption vulnerability in the ptp process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).

When was CVE-2021-36613 disclosed?

CVE-2021-36613 was first published in the National Vulnerability Database on May 11, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-36613 actively exploited?

CVE-2021-36613 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-36613?

CVE-2021-36613 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2021-36613?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-36613, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-36613

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36613?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)