How severe is CVE-2015-7856?

CVE-2015-7856 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2015-7856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-7856?

CVE-2015-7856 affects Opennms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-7856?

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-2015-7856 published?

CVE-2015-7856 was published on 2015-10-16 and last updated on 2026-06-17.

CVE-2015-7856

CVE-2015-7856 is a critical-severity vulnerability in Opennms with a CVSS 2.0 base score of 10.0. 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-255.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Opennms
Published: 2015-10-16
Last modified: 2026-06-17

Description

OpenNMS has a default password of rtc for the rtc account, which makes it easier for remote attackers to obtain access by leveraging knowledge of the credentials.

Frequently asked questions

What is CVE-2015-7856?: OpenNMS has a default password of rtc for the rtc account, which makes it easier for remote attackers to obtain access by leveraging knowledge of the credentials.
How severe is CVE-2015-7856?: CVE-2015-7856 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2015-7856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-7856?: CVE-2015-7856 affects Opennms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-7856?: 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-2015-7856 published?: CVE-2015-7856 was published on 2015-10-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opennms:opennms:-:*:*:*:*:*:*:*

More vulnerabilities in Opennms

CVE-2016-6556 — High (CVSS 7.1): OpenNMS version 18.0.1 and prior are vulnerable to a stored XSS issue due to insufficient filtering of SNMP agent…
CVE-2016-6555 — High (CVSS 7.1): OpenNMS version 18.0.1 and prior are vulnerable to a stored XSS issue due to insufficient filtering of SNMP trap…
CVE-2020-1652 — Medium (CVSS 5.6): OpenNMS is accessible via port 9443
CVE-2021-25932 — Medium (CVSS 5.4): In OpenNMS Horizon, versions opennms-1-0-stable through opennms-27.1.0-1; OpenNMS Meridian, versions…
CVE-2014-3960 — Medium (CVSS 4.3): Multiple cross-site scripting (XSS) vulnerabilities in OpenNMS before 1.12.7 allow remote attackers to inject arbitrary…
CVE-2008-6095 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in surveillanceView.htm in OpenNMS 1.5.94 allows remote attackers to inject…

All CVEs affecting Opennms →

Other CWE-255 (Credentials Management Errors) vulnerabilities

CVE-2016-0898 — Critical (CVSS 10.0): MySQL for PCF tiles 1.7.x before 1.7.10 were discovered to log the AWS access key in plaintext. These credentials were…
CVE-2015-7906 — Critical (CVSS 10.0): LOYTEC LIP-3ECTB 6.0.1, LINX-100, LVIS-3E100, and LIP-ME201 devices allow remote attackers to read a password-hash…
CVE-2014-9736 — Critical (CVSS 10.0): GE Healthcare Centricity Clinical Archive Audit Trail Repository has a default password of initinit for the (1) SSL key…
CVE-2014-7233 — Critical (CVSS 10.0): GE Healthcare Precision THUNIS-800+ has a default password of (1) 1973 for the factory default System Utilities menu,…
CVE-2014-7232 — Critical (CVSS 10.0): GE Healthcare Discovery XR656 and XR656 G2 has a password of (1) 2getin for the insite user, (2) 4$xray for the xruser…
CVE-2013-7442 — Critical (CVSS 10.0): GE Healthcare Centricity PACS Workstation 4.0 and 4.0.1 has a password of (1) CANal1 for the Administrator user and (2)…

Browse all CWE-255 (Credentials Management Errors) vulnerabilities →