CVE-2005-3921: Cross-site scripting (XSS) vulnerability in Cisco IOS Web Server for IOS 12.0(2a) allows remote attackers to inject arbitrary web script or HTML by (1...

Description

Cross-site scripting (XSS) vulnerability in Cisco IOS Web Server for IOS 12.0(2a) allows remote attackers to inject arbitrary web script or HTML by (1) packets containing HTML that an administrator views via an HTTP interface to the contents of memory buffers, as demonstrated by the URI /level/15/exec/-/buffers/assigned/dump; or (2) sending the router Cisco Discovery Protocol (CDP) packets with HTML payload that an administrator views via the CDP status pages. NOTE: these vectors were originally reported as being associated with the dump and packet options in /level/15/exec/-/show/buffers.

Metrics

EPSS Probability

2.76%

84.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios	<= 12.3
Cisco	Ios	12.3\(1a\)
Cisco	Ios	12.3\(2\)ja
Cisco	Ios	12.3\(2\)ja5
Cisco	Ios	12.3\(2\)jk
Cisco	Ios	12.3\(2\)jk1
Cisco	Ios	12.3\(2\)t3
Cisco	Ios	12.3\(2\)t8
Cisco	Ios	12.3\(2\)xa4
Cisco	Ios	12.3\(2\)xa5
Cisco	Ios	12.3\(2\)xc1
Cisco	Ios	12.3\(2\)xc2
Cisco	Ios	12.3\(2\)xc3
Cisco	Ios	12.3\(2\)xc4
Cisco	Ios	12.3\(2\)xe3
Cisco	Ios	12.3\(2\)xe4
Cisco	Ios	12.3\(3e\)
Cisco	Ios	12.3\(3h\)
Cisco	Ios	12.3\(3i\)
Cisco	Ios	12.3\(4\)eo1
Cisco	Ios	12.3\(4\)ja
Cisco	Ios	12.3\(4\)ja1
Cisco	Ios	12.3\(4\)t
Cisco	Ios	12.3\(4\)t1
Cisco	Ios	12.3\(4\)t2
Cisco	Ios	12.3\(4\)t3
Cisco	Ios	12.3\(4\)t4
Cisco	Ios	12.3\(4\)t8
Cisco	Ios	12.3\(4\)tpc11a
Cisco	Ios	12.3\(4\)xd
Cisco	Ios	12.3\(4\)xd1
Cisco	Ios	12.3\(4\)xd2
Cisco	Ios	12.3\(4\)xe4
Cisco	Ios	12.3\(4\)xg1
Cisco	Ios	12.3\(4\)xg2
Cisco	Ios	12.3\(4\)xg4
Cisco	Ios	12.3\(4\)xg5
Cisco	Ios	12.3\(4\)xh
Cisco	Ios	12.3\(4\)xk
Cisco	Ios	12.3\(4\)xk1
Cisco	Ios	12.3\(4\)xk3
Cisco	Ios	12.3\(4\)xk4
Cisco	Ios	12.3\(4\)xq
Cisco	Ios	12.3\(4\)xq1
Cisco	Ios	12.3\(5\)
Cisco	Ios	12.3\(5\)b1
Cisco	Ios	12.3\(5a\)
Cisco	Ios	12.3\(5a\)b
Cisco	Ios	12.3\(5a\)b2
Cisco	Ios	12.3\(5a\)b5

Showing 50 of 225 affected configurations. See NVD for the full list.

References

Timeline

Published: Nov 30, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-3921?

Cross-site scripting (XSS) vulnerability in Cisco IOS Web Server for IOS 12.0(2a) allows remote attackers to inject arbitrary web script or HTML by (1) packets containing HTML that an administrator views via an HTTP interface to the contents of memory buffers, as demonstrated by the URI /level/15/exec/-/buffers/assigned/dump; or (2) sending the router Cisco Discovery Protocol (CDP) packets with HTML payload that an administrator views via the CDP status pages. NOTE: these vectors were originally reported as being associated with the dump and packet options in /level/15/exec/-/show/buffers.

How severe is CVE-2005-3921?

Severity scoring for CVE-2005-3921 is pending analysis. The EPSS model estimates a 2.76% probability of exploitation in the next 30 days.

How do I fix CVE-2005-3921?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.