How severe is CVE-2005-1935?

CVE-2005-1935 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2005-1935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-1935?

CVE-2005-1935 primarily affects Microsoft Windows 2000. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-1935?

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-2005-1935 published?

CVE-2005-1935 was published on 2005-06-13 and last updated on 2026-06-16.

CVE-2005-1935

CVE-2005-1935 is a high-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 27% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 27% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 2000
Published: 2005-06-13
Last modified: 2026-06-16

Description

Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818. NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.

Frequently asked questions

What is CVE-2005-1935?: Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818. NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.
How severe is CVE-2005-1935?: CVE-2005-1935 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-1935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 27% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-1935?: CVE-2005-1935 primarily affects Microsoft Windows 2000. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-1935?: 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-2005-1935 published?: CVE-2005-1935 was published on 2005-06-13 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:o:microsoft:windows_2000:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:*:sp3:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:*:sp4:*:fr:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:64-bit:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp6:terminal_server:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:server:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp6a:workstation:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:gold:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp1:tablet_pc:*:*:*:*:*

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