How severe is CVE-2020-23914?

CVE-2020-23914 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-2020-23914 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23914?

CVE-2020-23914 affects Cpp-peglib Project Cpp-peglib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23914?

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

When was CVE-2020-23914 published?

CVE-2020-23914 was published on 2021-04-21 and last updated on 2026-06-17.

CVE-2020-23914

CVE-2020-23914 is a medium-severity vulnerability in Cpp-peglib Project Cpp-peglib 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Cpp-peglib Project Cpp-peglib
Published: 2021-04-21
Last modified: 2026-06-17

Description

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Frequently asked questions

What is CVE-2020-23914?: An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.
How severe is CVE-2020-23914?: CVE-2020-23914 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-2020-23914 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23914?: CVE-2020-23914 affects Cpp-peglib Project Cpp-peglib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23914?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-23914 published?: CVE-2020-23914 was published on 2021-04-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cpp-peglib_project:cpp-peglib:*:*:*:*:*:*:*:*

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