How severe is CVE-2008-5421?

CVE-2008-5421 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-5421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5421?

CVE-2008-5421 primarily affects Netwin Smsgate. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5421?

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

When was CVE-2008-5421 published?

CVE-2008-5421 was published on 2008-12-11 and last updated on 2026-06-16.

CVE-2008-5421

CVE-2008-5421 is a medium-severity vulnerability in Netwin Smsgate 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Netwin Smsgate
Published: 2008-12-11
Last modified: 2026-06-16

Description

The SSL web administration service in NetWin SmsGate 1.1n and earlier allows remote attackers to cause a denial of service (hang) via (1) a large integer in the Content-Length HTTP header; (2) an invalid value in the Content-Length HTTP header, as demonstrated by a negative integer; or (3) a missing Content-Length HTTP header.

Frequently asked questions

What is CVE-2008-5421?: The SSL web administration service in NetWin SmsGate 1.1n and earlier allows remote attackers to cause a denial of service (hang) via (1) a large integer in the Content-Length HTTP header; (2) an invalid value in the Content-Length HTTP header, as demonstrated by a negative integer; or (3) a missing Content-Length HTTP header.
How severe is CVE-2008-5421?: CVE-2008-5421 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-5421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5421?: CVE-2008-5421 primarily affects Netwin Smsgate. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5421 published?: CVE-2008-5421 was published on 2008-12-11 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:netwin:smsgate:*:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.0a:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.0c:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.0h:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.0r:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.0w:*:*:*:*:*:*:*
cpe:2.3:a:netwin:smsgate:1.1m:*:*:*:*:*:*:*

Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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