CVE-2023-30800

MikroTik RouterOS Web Interface Heap Corruption

At a glance

Severity: HIGH 7.5
EPSS: EPSS 1.69 % · percentile 77 (2026-10-27)
State: PUBLISHED
Published: 2023-09-07
Updated: 2025-11-21
Assigner: VulnCheck
NVD status: Modified

Description

The web server used by MikroTik RouterOS version 6 is affected by a heap memory corruption issue. A remote and unauthenticated attacker can corrupt the server's heap memory by sending a crafted HTTP request. As a result, the web interface crashes and is immediately restarted. The issue was fixed in RouterOS 6.49.10 stable. RouterOS version 7 is not affected.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-787

European references

ENISA EUVD · EUVD-2023-35160
GCVE · GCVE-0-2023-30800

Affected configurations (NVD CPE)

cpe:2.3:o:mikrotik:routeros:*:*:*:*:-:*:*:* ≥ 6.0 < 6.49.10

Affected products

Product	Versions
MikroTik · RouterOS	unaffected 6.49.10 ; affected 6.49.9 ; affected 6.48.8

References

https://vulncheck.com/advisories/mikrotik-jsproxy-dos

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD