CVE-2008-3821

CVE-2008-3821 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.3)
• EPSS exploit prediction: 5% (92nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-79
• Affected product: Cisco Ios
• Published: 2009-01-16
• Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in the HTTP server in Cisco IOS 11.0 through 12.4 allow remote attackers to inject arbitrary web script or HTML via (1) the query string to the ping program or (2) unspecified other aspects of the URI.

Frequently asked questions

What is CVE-2008-3821?

Multiple cross-site scripting (XSS) vulnerabilities in the HTTP server in Cisco IOS 11.0 through 12.4 allow remote attackers to inject arbitrary web script or HTML via (1) the query string to the ping program or (2) unspecified other aspects of the URI.

How severe is CVE-2008-3821?

CVE-2008-3821 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2008-3821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3821?

CVE-2008-3821 primarily affects Cisco Ios. In total, 284 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-3821?

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

When was CVE-2008-3821 published?

CVE-2008-3821 was published on 2009-01-16 and last updated on 2026-06-16.

References

• http://jvn.jp/en/jp/JVN28344798/index.html
• http://osvdb.org/51393
• http://osvdb.org/51394
• http://secunia.com/advisories/33461
• http://securityreason.com/securityalert/4916
• http://securitytracker.com/id?1021598
• http://www.cisco.com/en/US/products/products_security_response09186a0080a5c501.html
• http://www.procheckup.com/vulnerability_manager/vulnerabilities/pr08-19
• http://www.securityfocus.com/archive/1/500063/100/0/threaded
• http://www.securityfocus.com/bid/33260
• http://www.vupen.com/english/advisories/2009/0138
• https://exchange.xforce.ibmcloud.com/vulnerabilities/47947

Affected products (284)

• cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0da:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0db:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0dc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sl:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sp:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0st:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sy:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0sz:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0w:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0wc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xa:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xe:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xg:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xh:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xi:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xj:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xk:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xl:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xm:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xn:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xq:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xr:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xs:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xt:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.0xv:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1aa:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1ax:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1ay:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1cx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1da:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.1db:*:*:*:*:*:*:*

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