How severe is CVE-2026-45777?

CVE-2026-45777 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-2026-45777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45777?

CVE-2026-45777 affects Buffalo Open Xdmod. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45777?

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.

Does CVE-2026-45777 have an EU (EUVD) identifier?

Yes. CVE-2026-45777 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34904.

When was CVE-2026-45777 published?

CVE-2026-45777 was published on 2026-06-05 and last updated on 2026-06-17.

CVE-2026-45777

CVE-2026-45777 is a critical-severity vulnerability in Buffalo Open Xdmod 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34904
Weakness: CWE-78
Affected product: Buffalo Open Xdmod
Published: 2026-06-05
Last modified: 2026-06-17

Description

OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Starting in version 9.5.0 and prior to version 11.0.3, an attacker can remotely execute arbitrary system commands on the web server hosting Open XDMoD with the privileges of the web server process. This could allow an attacker to read or modify application data, alter system configuration, or disrupt service availability. All deployments of Open XDMoD versions 9.5.0 through 11.0.2 (inclusive) are impacted. This issue was reported privately on 2026-04-06, and at this time there is no evidence that this vulnerability has been exploited in the wild. The vulnerability was patched in Open XDMoD 11.0.3 on 2026-05-12. As a workaround, apply the patch manually.

Frequently asked questions

What is CVE-2026-45777?: OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Starting in version 9.5.0 and prior to version 11.0.3, an attacker can remotely execute arbitrary system commands on the web server hosting Open XDMoD with the privileges of the web server process. This could allow an attacker to read or modify application data, alter system configuration, or disrupt service availability. All deployments of Open XDMoD versions 9.5.0 through 11.0.2 (inclusive) are impacted. This issue was reported privately on 2026-04-06, and at this time there is no evidence that this vulnerability has been exploited in the wild. The vulnerability was patched in Open XDMoD 11.0.3 on 2026-05-12. As a workaround, apply the patch manually.
How severe is CVE-2026-45777?: CVE-2026-45777 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-2026-45777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45777?: CVE-2026-45777 affects Buffalo Open Xdmod. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45777?: 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.
Does CVE-2026-45777 have an EU (EUVD) identifier?: Yes. CVE-2026-45777 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34904.
When was CVE-2026-45777 published?: CVE-2026-45777 was published on 2026-06-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:buffalo:open_xdmod:*:*:*:*:*:*:*:*

More vulnerabilities in Buffalo Open Xdmod

CVE-2026-45779 — Critical (CVSS 9.8): OpenXDMoD is an open framework for collecting and analyzing HPC metrics. An SQL injection vulnerability exists in Open…
CVE-2018-16988 — Critical (CVSS 9.8): An issue was discovered in Open XDMoD through 7.5.0. An authentication bypass (account takeover) exists due to a weak…
CVE-2018-16961 — High (CVSS 7.5): An issue was discovered in Open XDMoD through 7.5.0. html/gui/general/dl_publication.php allows Path traversal via the…
CVE-2018-16960 — Medium (CVSS 6.1): An issue was discovered in Open XDMoD through 7.5.0. html/gui/general/login.php has Reflected XSS via the…
CVE-2026-45778 — Medium (CVSS 5.4): OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Prior to version 11.0.3, an authenticated…
CVE-2026-45776 — Medium (CVSS 4.3): OpenXDMoD is an open framework for collecting and analyzing HPC metrics. Prior to version 11.0.3, a flaw in Open…

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