Buffer overflow in a certain DCOM interface for RPC in Microsoft Windows NT 4.0, 2000, XP, and Server 2003 allows remote attackers to execute arbitrary code via a malformed message, as exploited by the Blaster/MSblast/LovSAN and Nachi/Welchia worms.
CVE-2003-0352
Score elevated to 9.0 because EPSS predicts 91% probability of exploitation within the next 30 days (top 0.3% of all CVEs). Confidence: see factors.
- High exploitation likelihood — EPSS 99%
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 9.0(low)
- EPSS
- 99.9%
- KEV
- Not listed
Published
August 18, 2003
Last Modified
June 16, 2026
References (28)
- cve@mitrehttp://lists.grok.org.uk/pipermail/full-disclosure/2003-July/007079.html
- cve@mitrehttp://lists.grok.org.uk/pipermail/full-disclosure/2003-July/007357.html
- cve@mitrehttp://marc.info/?l=bugtraq&m=105838687731618&w=2
- cve@mitrehttp://marc.info/?l=bugtraq&m=105914789527294&w=2
- cve@mitrehttp://www.cert.org/advisories/CA-2003-16.html
- cve@mitrehttp://www.cert.org/advisories/CA-2003-19.html
- cve@mitrehttp://www.kb.cert.org/vuls/id/568148
- cve@mitrehttp://www.securityfocus.com/bid/8205
- cve@mitrehttp://www.xfocus.org/documents/200307/2.html
- cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-026
- cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/12629
- cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A194
- cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2343
- cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A296
- af854a3a-2127-422b-91ae-364da2661108http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/007079.html
Data Freshness Timeline
(refreshed 0× in last 7d / 4× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-06-21 01:56 UTCEPSS rescore
- 2026-06-18 17:49 UTCEPSS rescore
- 2026-06-18 17:49 UTCEPSS rescore
- 2026-06-15 17:43 UTCEPSS rescore
- 2026-06-13 22:56 UTCEPSS rescore
- 2026-06-12 23:08 UTCEPSS rescore
- 2026-06-10 22:13 UTCEPSS rescore
- 2026-06-10 13:17 UTCEPSS rescore
- 2026-06-06 13:44 UTCEPSS rescore
- 2026-06-06 13:44 UTCEPSS rescore
- 2026-06-06 13:44 UTCEPSS rescore
- 2026-06-05 22:43 UTCEPSS rescore
- 2026-06-05 22:43 UTCEPSS rescore
- 2026-06-05 06:07 UTCEPSS rescore
- 2026-06-02 20:10 UTCEPSS rescore
- 2026-06-01 13:49 UTCEPSS rescore
- 2026-06-01 13:49 UTCEPSS rescore
- 2026-05-31 17:24 UTCEG score recompute
- 2026-05-31 17:24 UTCGHSA enrichment
- 2026-05-31 00:13 UTCEPSS rescore
- 2026-05-31 00:13 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-26 13:41 UTCEPSS rescore
Show 6 moreShow fewer
- 2026-05-26 13:41 UTCEPSS rescore
- 2026-05-24 16:42 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-20 22:36 UTCEPSS rescore
- 2026-05-18 21:29 UTCEPSS rescore
- 2026-05-18 21:29 UTCEPSS rescore
Publicly available exploits
(4 references)Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Exploit-DBEDB-16749✓ verifiedFirst seen Jan 11, 2011
Microsoft RPC DCOM Interface - Remote Overflow (MS03-026) (Metasploit)
Open source ↗ - Exploit-DBEDB-100✓ verifiedFirst seen Sep 16, 2003
Microsoft Windows - 'RPC DCOM' Long Filename Overflow (MS03-026)
Open source ↗ - Exploit-DBEDB-22917✓ verifiedFirst seen Aug 11, 2003
Microsoft Windows - DCOM RPC Interface Buffer Overrun
Open source ↗ - Metasploitexploit/windows/dcerpc/ms03_026_dcom✓ verifiedFirst seen Jul 16, 2003
MS03-026 Microsoft RPC DCOM Interface Overflow
Open source ↗
Frequently asked(4)
What is CVE-2003-0352?
When was CVE-2003-0352 disclosed?
Is CVE-2003-0352 actively exploited?
How do I remediate CVE-2003-0352?
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