How severe is CVE-2023-49721?

CVE-2023-49721 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-49721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49721?

CVE-2023-49721 primarily affects Canonical Lxd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-49721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-49721 have an EU (EUVD) identifier?

Yes. CVE-2023-49721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-53649.

When was CVE-2023-49721 published?

CVE-2023-49721 was published on 2024-02-14 and last updated on 2026-06-17.

CVE-2023-49721

CVE-2023-49721 is a medium-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 6.7. 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-276.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-53649
Weakness: CWE-276
Affected product: Canonical Lxd
Published: 2024-02-14
Last modified: 2026-06-17

Description

An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.

Frequently asked questions

What is CVE-2023-49721?: An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.
How severe is CVE-2023-49721?: CVE-2023-49721 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-49721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49721?: CVE-2023-49721 primarily affects Canonical Lxd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-49721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-49721 have an EU (EUVD) identifier?: Yes. CVE-2023-49721 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-53649.
When was CVE-2023-49721 published?: CVE-2023-49721 was published on 2024-02-14 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:*:-:*:*:*:*:*:*

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