How severe is CVE-2020-24753?

CVE-2020-24753 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2020-24753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24753?

CVE-2020-24753 affects Objective Open Cbor Run-time Project Objective Open Cbor Run-time. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-24753?

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-2020-24753 published?

CVE-2020-24753 was published on 2020-09-17 and last updated on 2026-06-17.

CVE-2020-24753

CVE-2020-24753 is a critical-severity vulnerability in Objective Open Cbor Run-time Project Objective Open Cbor Run-time with a CVSS 3.x base score of 9.8. 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-755.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
Affected product: Objective Open Cbor Run-time Project Objective Open Cbor Run-time
Published: 2020-09-17
Last modified: 2026-06-17

Description

A memory corruption vulnerability in Objective Open CBOR Run-time (oocborrt) in versions before 2020-08-12 could allow an attacker to execute code via crafted Concise Binary Object Representation (CBOR) input to the cbor2json decoder. An uncaught error while decoding CBOR Major Type 3 text strings leads to the use of an attacker-controllable uninitialized stack value. This can be used to modify memory, causing a crash or potentially exploitable heap corruption.

Frequently asked questions

What is CVE-2020-24753?: A memory corruption vulnerability in Objective Open CBOR Run-time (oocborrt) in versions before 2020-08-12 could allow an attacker to execute code via crafted Concise Binary Object Representation (CBOR) input to the cbor2json decoder. An uncaught error while decoding CBOR Major Type 3 text strings leads to the use of an attacker-controllable uninitialized stack value. This can be used to modify memory, causing a crash or potentially exploitable heap corruption.
How severe is CVE-2020-24753?: CVE-2020-24753 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2020-24753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24753?: CVE-2020-24753 affects Objective Open Cbor Run-time Project Objective Open Cbor Run-time. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-24753?: 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-2020-24753 published?: CVE-2020-24753 was published on 2020-09-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:objective_open_cbor_run-time_project:objective_open_cbor_run-time:*:*:*:*:*:*:*:*

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