How severe is CVE-2010-0303?

CVE-2010-0303 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2010-0303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0303?

CVE-2010-0303 primarily affects Dinko Korunic Hybserv2. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0303?

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

When was CVE-2010-0303 published?

CVE-2010-0303 was published on 2010-02-04 and last updated on 2026-06-16.

CVE-2010-0303

CVE-2010-0303 is a medium-severity vulnerability in Dinko Korunic Hybserv2 with a CVSS 2.0 base score of 5.0. 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: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Dinko Korunic Hybserv2
Published: 2010-02-04
Last modified: 2026-06-16

Description

mystring.c in hybserv in IRCD-Hybrid (aka Hybrid2 IRC Services) 1.9.2 through 1.9.4 allows remote attackers to cause a denial of service (daemon crash) via a ":help \t" private message to the MemoServ service.

Frequently asked questions

What is CVE-2010-0303?: mystring.c in hybserv in IRCD-Hybrid (aka Hybrid2 IRC Services) 1.9.2 through 1.9.4 allows remote attackers to cause a denial of service (daemon crash) via a ":help \t" private message to the MemoServ service.
How severe is CVE-2010-0303?: CVE-2010-0303 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2010-0303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-0303?: CVE-2010-0303 primarily affects Dinko Korunic Hybserv2. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-0303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-0303 published?: CVE-2010-0303 was published on 2010-02-04 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:dinko_korunic:hybserv2:1.9.2:*:*:*:*:*:*:*
cpe:2.3:a:dinko_korunic:hybserv2:1.9.3:*:*:*:*:*:*:*
cpe:2.3:a:dinko_korunic:hybserv2:1.9.4:*:*:*:*:*:*:*

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