How severe is CVE-2007-3837?

CVE-2007-3837 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-3837 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3837?

CVE-2007-3837 affects Hydrairc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-3837?

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-2007-3837 published?

CVE-2007-3837 was published on 2007-07-17 and last updated on 2026-06-16.

CVE-2007-3837

CVE-2007-3837 is a high-severity vulnerability in Hydrairc with a CVSS 2.0 base score of 7.8. 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 7.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hydrairc
Published: 2007-07-17
Last modified: 2026-06-16

Description

Heap-based buffer overflow in HydraIRC 0.3.151 allows remote IRC servers to cause a denial of service (application crash) via a long CTCP request message containing '%' (percent) characters.

Frequently asked questions

What is CVE-2007-3837?: Heap-based buffer overflow in HydraIRC 0.3.151 allows remote IRC servers to cause a denial of service (application crash) via a long CTCP request message containing '%' (percent) characters.
How severe is CVE-2007-3837?: CVE-2007-3837 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-3837 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3837?: CVE-2007-3837 affects Hydrairc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-3837?: 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-2007-3837 published?: CVE-2007-3837 was published on 2007-07-17 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:hydrairc:hydrairc:0.3.151:*:*:*:*:*:*:*

More vulnerabilities in Hydrairc

CVE-2007-3836 — High (CVSS 7.8): Format string vulnerability in HydraIRC 0.3.151 allows remote attackers to cause a denial of service via format string…
CVE-2008-3578 — Medium (CVSS 5.0): HydraIRC 0.3.164 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and…

All CVEs affecting Hydrairc →