How severe is CVE-2015-4556?

CVE-2015-4556 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2015-4556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4556?

CVE-2015-4556 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4556?

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-2015-4556 published?

CVE-2015-4556 was published on 2017-03-29 and last updated on 2026-06-17.

CVE-2015-4556

CVE-2015-4556 is a high-severity vulnerability in Call-cc Chicken with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Call-cc Chicken
Published: 2017-03-29
Last modified: 2026-06-17

Description

The string-translate* procedure in the data-structures unit in CHICKEN before 4.10.0 allows remote attackers to cause a denial of service (crash).

Frequently asked questions

What is CVE-2015-4556?: The string-translate* procedure in the data-structures unit in CHICKEN before 4.10.0 allows remote attackers to cause a denial of service (crash).
How severe is CVE-2015-4556?: CVE-2015-4556 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2015-4556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4556?: CVE-2015-4556 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4556?: 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-2015-4556 published?: CVE-2015-4556 was published on 2017-03-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:call-cc:chicken:*:rc1:*:*:*:*:*:*

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