How severe is CVE-2019-13955?

CVE-2019-13955 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-13955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-13955?

CVE-2019-13955 primarily affects Mikrotik Routeros. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-13955?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-13955 published?

CVE-2019-13955 was published on 2019-07-26 and last updated on 2026-06-17.

CVE-2019-13955

CVE-2019-13955 is a medium-severity vulnerability in Mikrotik Routeros with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Mikrotik Routeros
Published: 2019-07-26
Last modified: 2026-06-17

Description

Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable to stack exhaustion. By sending a crafted HTTP request, an authenticated remote attacker can crash the HTTP server via recursive parsing of JSON. Malicious code cannot be injected.

Frequently asked questions

What is CVE-2019-13955?: Mikrotik RouterOS before 6.44.5 (long-term release tree) is vulnerable to stack exhaustion. By sending a crafted HTTP request, an authenticated remote attacker can crash the HTTP server via recursive parsing of JSON. Malicious code cannot be injected.
How severe is CVE-2019-13955?: CVE-2019-13955 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-13955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-13955?: CVE-2019-13955 primarily affects Mikrotik Routeros. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-13955?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-13955 published?: CVE-2019-13955 was published on 2019-07-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
cpe:2.3:o:mikrotik:routeros:6.45:*:*:*:*:*:*:*

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Other CWE-674 (Uncontrolled Recursion) vulnerabilities

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CVE-2018-1000618 — Critical (CVSS 9.8): EOSIO/eos eos version after commit f1545dd0ae2b77580c2236fdb70ae7138d2c7168 contains a stack overflow vulnerability in…
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Browse all CWE-674 (Uncontrolled Recursion) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

35.130.111.146 (ipv4-addr)
35.130.111.98 (ipv4-addr)
27.110.176.222 (ipv4-addr)