Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable to memory exhaustion.

published 2019-07-26 7y ago modified 2026-06-17 4mo ago also EUVD-2019-5221

cvss: 6.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.3%; EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable to memory exhaustion. By sending a crafted HTTP request, an authenticated remote attacker can crash the HTTP server and in some circumstances reboot the system. Malicious code cannot be injected.

Patch / fix

fixed in 1

mikrotik routeros 6.44.5

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Exploit prediction

4.26% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.5	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	6.8	AV:N/AC:L/Au:S/C:N/I:N/A:C

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling

References

seclists.org /fulldisclosure/2019/Jul/20
mailing-list, third-party-advisory
packetstormsecurity.com /files/153733/Mikrotik-RouterOS-Resource-Stack-Exhaustion.html
third-party-advisory, vdb-entry

Sources

CVE List CVE-2019-13954
NVD CVE-2019-13954

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