How severe is CVE-2021-31681?

CVE-2021-31681 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31681 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-2021-31681?

CVE-2021-31681 affects Ultralytics Yolov3. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31681?

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-2021-31681 published?

CVE-2021-31681 was published on 2023-07-31 and last updated on 2026-06-17.

CVE-2021-31681

CVE-2021-31681 is a high-severity vulnerability in Ultralytics Yolov3 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Ultralytics Yolov3
Published: 2023-07-31
Last modified: 2026-06-17

Description

Deserialization of Untrusted Data vulnerability in yolo 3 allows attackers to execute arbitrary code via crafted yaml file.

Frequently asked questions

What is CVE-2021-31681?: Deserialization of Untrusted Data vulnerability in yolo 3 allows attackers to execute arbitrary code via crafted yaml file.
How severe is CVE-2021-31681?: CVE-2021-31681 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31681 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-2021-31681?: CVE-2021-31681 affects Ultralytics Yolov3. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31681?: 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-2021-31681 published?: CVE-2021-31681 was published on 2023-07-31 and last updated on 2026-06-17.

References

https://huntr.dev/bounties/1-other-yolov3/

Affected products (1)

cpe:2.3:a:ultralytics:yolov3:-:*:*:*:*:*:*:*

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