How severe is CVE-2021-0188?

CVE-2021-0188 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-0188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0188?

CVE-2021-0188 primarily affects Intel Xeon E3-1558l V5 Firmware. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-0188?

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

When was CVE-2021-0188 published?

CVE-2021-0188 was published on 2022-05-12 and last updated on 2026-06-17.

CVE-2021-0188

CVE-2021-0188 is a high-severity vulnerability in Intel Xeon E3-1558l V5 Firmware with a CVSS 3.x base score of 7.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Intel Xeon E3-1558l V5 Firmware
Published: 2022-05-12
Last modified: 2026-06-17

Description

Return of pointer value outside of expected range in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable aescalation of privilege via local access.

Frequently asked questions

What is CVE-2021-0188?: Return of pointer value outside of expected range in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable aescalation of privilege via local access.
How severe is CVE-2021-0188?: CVE-2021-0188 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-0188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0188?: CVE-2021-0188 primarily affects Intel Xeon E3-1558l V5 Firmware. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-0188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-0188 published?: CVE-2021-0188 was published on 2022-05-12 and last updated on 2026-06-17.

References

Affected products (37)

cpe:2.3:o:intel:xeon_e3-1558l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1565l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1578l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1585_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1585l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1515m_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1545m_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1575m_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1220_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1225_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1230_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1235l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1240_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1240l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1245_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1260l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1268l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1270_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1275_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1280_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1505l_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1505m_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1535m_v5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1285_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1501l_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1501m_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1220_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1225_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1230_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1240_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1245_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1270_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1275_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1280_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1505l_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1505m_v6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:intel:xeon_e3-1535m_v6_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Intel Xeon E3-1558l V5 Firmware

CVE-2021-33123 — High (CVSS 7.8): Improper access control in the BIOS authenticated code module for some Intel(R) Processors may allow a privileged user…
CVE-2021-0189 — High (CVSS 7.8): Use of out-of-range pointer offset in the BIOS firmware for some Intel(R) Processors may allow a privileged user to…
CVE-2021-0154 — High (CVSS 7.8): Improper input validation in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially…
CVE-2019-0124 — High (CVSS 7.8): Insufficient memory protection in Intel(R) 6th Generation Core Processors and greater, supporting TXT, may allow a…
CVE-2019-0123 — High (CVSS 7.8): Insufficient memory protection in Intel(R) 6th Generation Core Processors and greater, supporting SGX, may allow a…
CVE-2019-0155 — High (CVSS 7.8): Insufficient access control in a subsystem for Intel (R) processor graphics in 6th, 7th, 8th and 9th Generation…

All CVEs affecting Intel Xeon E3-1558l V5 Firmware →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →