How severe is CVE-2021-39063?

CVE-2021-39063 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2021-39063 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39063?

CVE-2021-39063 affects Ibm Spectrum Protect Plus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39063?

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-2021-39063 published?

CVE-2021-39063 was published on 2021-12-13 and last updated on 2026-06-17.

CVE-2021-39063

CVE-2021-39063 is a critical-severity vulnerability in Ibm Spectrum Protect Plus with a CVSS 3.x base score of 9.1. 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-346.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Ibm Spectrum Protect Plus
Published: 2021-12-13
Last modified: 2026-06-17

Description

IBM Spectrum Protect Plus 10.1.0.0 through 10.1.8.x uses Cross-Origin Resource Sharing (CORS) which could allow an attacker to carry out privileged actions and retrieve sensitive information due to a misconfiguration in access control headers. IBM X-Force ID: 214956.

Frequently asked questions

What is CVE-2021-39063?: IBM Spectrum Protect Plus 10.1.0.0 through 10.1.8.x uses Cross-Origin Resource Sharing (CORS) which could allow an attacker to carry out privileged actions and retrieve sensitive information due to a misconfiguration in access control headers. IBM X-Force ID: 214956.
How severe is CVE-2021-39063?: CVE-2021-39063 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2021-39063 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39063?: CVE-2021-39063 affects Ibm Spectrum Protect Plus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39063?: 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-2021-39063 published?: CVE-2021-39063 was published on 2021-12-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:spectrum_protect_plus:*:*:*:*:*:*:*:*

More vulnerabilities in Ibm Spectrum Protect Plus

CVE-2020-4854 — Critical (CVSS 9.8): IBM Spectrum Protect Plus 10.1.0 thorugh 10.1.6 contains hard-coded credentials, such as a password or cryptographic…
CVE-2020-4469 — Critical (CVSS 9.8): IBM Spectrum Protect Plus 10.1.0 through 10.1.5 could allow a remote attacker to execute arbitrary code on the system.…
CVE-2020-4216 — Critical (CVSS 9.8): IBM Spectrum Protect Plus 10.1.0 through 10.1.5 contains hard-coded credentials, such as a password or cryptographic…
CVE-2020-4208 — Critical (CVSS 9.8): IBM Spectrum Protect Plus 10.1.0 through 10.1.5 contains hard-coded credentials, such as a password or cryptographic…
CVE-2020-4242 — High (CVSS 8.8): IBM Spectrum Scale and IBM Spectrum Protect Plus 10.1.0 through 10.1.5 could allow a remote authenticated attacker to…
CVE-2020-4241 — High (CVSS 8.8): IBM Spectrum Scale and IBM Spectrum Protect Plus 10.1.0 through 10.1.5 could allow a remote authenticated attacker to…

All CVEs affecting Ibm Spectrum Protect Plus →

Other CWE-346 vulnerabilities

CVE-2026-42901 — Critical (CVSS 10.0): Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-6508 — Critical (CVSS 9.8): Origin Validation Error vulnerability in TUBITAK BILGEM Software Technologies Research Institute Liderahenk allows…
CVE-2026-2790 — Critical (CVSS 9.8): Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 148, Firefox ESR…
CVE-2022-50925 — Critical (CVSS 9.8): Prowise Reflect version 1.0.9 contains a remote keystroke injection vulnerability that allows attackers to send…
CVE-2025-30466 — Critical (CVSS 9.8): This issue was addressed through improved state management. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS…
CVE-2024-8487 — Critical (CVSS 9.8): A Cross-Origin Resource Sharing (CORS) vulnerability exists in modelscope/agentscope version v0.0.4. The CORS…

Browse all CWE-346 vulnerabilities →