CVE-2010-0303

NONECVSS 0.0Trending — 3 sources updated this weekWeaponized

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 94.6%
KEV: Not listed

Published

February 4, 2010

Last Modified

April 29, 2026

References (16)

secalert@redhathttp://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550389
secalert@redhathttp://marc.info/?l=oss-security&m=126476591925300&w=2
secalert@redhathttp://secunia.com/advisories/38350
secalert@redhathttp://secunia.com/advisories/38352
secalert@redhathttp://security.debian.org/pool/updates/main/h/hybserv/hybserv_1.9.2-4+lenny2.diff.gz
secalert@redhathttp://www.debian.org/security/2010/dsa-1982
secalert@redhathttp://www.securityfocus.com/bid/38006
secalert@redhathttps://exchange.xforce.ibmcloud.com/vulnerabilities/55992
af854a3a-2127-422b-91ae-364da2661108http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550389
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=oss-security&m=126476591925300&w=2
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/38350
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/38352
af854a3a-2127-422b-91ae-364da2661108http://security.debian.org/pool/updates/main/h/hybserv/hybserv_1.9.2-4+lenny2.diff.gz
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2010/dsa-1982
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/38006

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:09 UTCepss_batch
2026-06-04 13:09 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:13 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-29 12:54 UTCEG score recompute
2026-05-29 12:54 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-24 16:43 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-33581✓ verified
First seen Jan 29, 2010
Hybserv2 - ':help' Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-2010-0303?

CVE-2010-0303 is a none vulnerability published on February 4, 2010. 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.

When was CVE-2010-0303 disclosed?

CVE-2010-0303 was first published in the National Vulnerability Database on February 4, 2010, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2010-0303 actively exploited?

CVE-2010-0303 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2010-0303?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-0303, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2010-0303

📅 Published

🔄 Last Modified

🔗 References (16)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2010-0303?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (16)

Frequently asked(4)

Related CVEs(same CWE)