How severe is CVE-2005-0687?

CVE-2005-0687 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2005-0687 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-0687?

CVE-2005-0687 primarily affects Hashcash. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-0687?

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-2005-0687 published?

CVE-2005-0687 was published on 2005-03-06 and last updated on 2026-06-16.

CVE-2005-0687

CVE-2005-0687 is a high-severity vulnerability in Hashcash with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hashcash
Published: 2005-03-06
Last modified: 2026-06-16

Description

Format string vulnerability in Hashcash 1.16 allows remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via format string specifiers in a reply address, which is not properly handled when printing the header.

Frequently asked questions

What is CVE-2005-0687?: Format string vulnerability in Hashcash 1.16 allows remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via format string specifiers in a reply address, which is not properly handled when printing the header.
How severe is CVE-2005-0687?: CVE-2005-0687 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-0687 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-0687?: CVE-2005-0687 primarily affects Hashcash. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-0687?: 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-2005-0687 published?: CVE-2005-0687 was published on 2005-03-06 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:hashcash:hashcash:1.14:*:*:*:*:*:*:*
cpe:2.3:a:hashcash:hashcash:1.15:*:*:*:*:*:*:*
cpe:2.3:a:hashcash:hashcash:1.16:*:*:*:*:*:*:*

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