How severe is CVE-2018-15506?

CVE-2018-15506 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-15506 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15506?

CVE-2018-15506 affects Bubblesoftapps Bubbleupnp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15506?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-15506 published?

CVE-2018-15506 was published on 2019-06-19 and last updated on 2026-06-17.

CVE-2018-15506

CVE-2018-15506 is a critical-severity vulnerability in Bubblesoftapps Bubbleupnp with a CVSS 3.x base score of 9.8. 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-611.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Bubblesoftapps Bubbleupnp
Published: 2019-06-19
Last modified: 2026-06-17

Description

In BubbleUPnP 0.9 update 30, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Remote, unauthenticated attackers can use this vulnerability to: (1) Access arbitrary files from the filesystem with the same permission as the user account running BubbleUPnP, (2) Initiate SMB connections to capture a NetNTLM challenge/response and crack the cleartext password, or (3) Initiate SMB connections to relay a NetNTLM challenge/response and achieve Remote Command Execution in Windows domains.

Frequently asked questions

What is CVE-2018-15506?: In BubbleUPnP 0.9 update 30, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Remote, unauthenticated attackers can use this vulnerability to: (1) Access arbitrary files from the filesystem with the same permission as the user account running BubbleUPnP, (2) Initiate SMB connections to capture a NetNTLM challenge/response and crack the cleartext password, or (3) Initiate SMB connections to relay a NetNTLM challenge/response and achieve Remote Command Execution in Windows domains.
How severe is CVE-2018-15506?: CVE-2018-15506 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-15506 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15506?: CVE-2018-15506 affects Bubblesoftapps Bubbleupnp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15506?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-15506 published?: CVE-2018-15506 was published on 2019-06-19 and last updated on 2026-06-17.

References

https://www.bubblesoftapps.com/bubbleupnpserver2/docs/changelog.html

Affected products (1)

cpe:2.3:a:bubblesoftapps:bubbleupnp:0.9:update_30:*:*:*:*:*:*

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