Is CVE-2003-0356 in the CISA KEV catalog?

No. CVE-2003-0356 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0356?

CVE-2003-0356 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2003-0356?

CVE-2003-0356 has an EPSS score of 9.57% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2003-0356?

Upgrade ethereal to 0.9.12 or later.

CVE & CISA-KEV Catalog

CVE-2003-0356

CRITICALEPSS 95th pctl

9.8

CVSS v3

NVD

Description

Multiple off-by-one vulnerabilities in Ethereal 0.9.11 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via the (1) AIM, (2) GIOP Gryphon, (3) OSPF, (4) PPTP, (5) Quake, (6) Quake2, (7) Quake3, (8) Rsync, (9) SMB, (10) SMPP, and (11) TSP dissectors, which do not properly use the tvb_get_nstringz and tvb_get_nstringz0 functions.

CWE-193

How to fix

Remediation Available

etherealNVD

Affected:< 0.9.12Fixed in:0.9.12CVE-2003-0356derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

9.57%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.