How severe is CVE-2021-45935?

CVE-2021-45935 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45935?

CVE-2021-45935 affects Grok Project Grok. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45935?

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

When was CVE-2021-45935 published?

CVE-2021-45935 was published on 2022-01-01 and last updated on 2026-06-17.

CVE-2021-45935

CVE-2021-45935 is a medium-severity vulnerability in Grok Project Grok with a CVSS 3.x base score of 5.5. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Grok Project Grok
Published: 2022-01-01
Last modified: 2026-06-17

Description

Grok 9.5.0 has a heap-based buffer overflow in openhtj2k::T1OpenHTJ2K::decompress (called from std::__1::__packaged_task_func<std::__1::__bind<grk::T1DecompressScheduler::deco and std::__1::packaged_task<int).

Frequently asked questions

What is CVE-2021-45935?: Grok 9.5.0 has a heap-based buffer overflow in openhtj2k::T1OpenHTJ2K::decompress (called from std::__1::__packaged_task_func<std::__1::__bind<grk::T1DecompressScheduler::deco and std::__1::packaged_task<int).
How severe is CVE-2021-45935?: CVE-2021-45935 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45935?: CVE-2021-45935 affects Grok Project Grok. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45935 published?: CVE-2021-45935 was published on 2022-01-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:grok_project:grok:9.5.0:*:*:*:*:*:*:*

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