Vulnerability Database

393,392

Total vulnerabilities in the database

CVE-2005-3921 — cisco / ios

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.

  • Published: Nov 30, 2005
  • Updated: Oct 3, 2026
  • CVE: CVE-2005-3921
  • Severity: Low
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Low
  • Score: 2.6
  • AV:N/AC:H/Au:N/C:N/I:P/A:N

No CWE or OWASP classifications available.

Software Affected 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
cisco / ios = 12.3(5b)
cisco / ios = 12.3(5c)
cisco / ios = 12.3(5e)
cisco / ios = 12.3(5f)
cisco / ios = 12.3(6)
cisco / ios = 12.3(6a)
cisco / ios = 12.3(6d)
cisco / ios = 12.3(6e)
cisco / ios = 12.3(6f)
cisco / ios = 12.3(7)ja
cisco / ios = 12.3(7)ja1
cisco / ios = 12.3(7)jx
cisco / ios = 12.3(7)t
cisco / ios = 12.3(7)t4
cisco / ios = 12.3(7)t8
cisco / ios = 12.3(7)t9
cisco / ios = 12.3(7)t10
cisco / ios = 12.3(7)t12
cisco / ios = 12.3(7)xi3
cisco / ios = 12.3(7)xi4
cisco / ios = 12.3(7)xi7
cisco / ios = 12.3(7)xr3
cisco / ios = 12.3(7)xr4
cisco / ios = 12.3(7)xr6
cisco / ios = 12.3(7.7)
cisco / ios = 12.3(8)t4
cisco / ios = 12.3(8)t7
cisco / ios = 12.3(8)t8
cisco / ios = 12.3(8)t9
cisco / ios = 12.3(8)t11
cisco / ios = 12.3(8)xu2
cisco / ios = 12.3(8)xy4
cisco / ios = 12.3(8)xy5
cisco / ios = 12.3(8)xy6
cisco / ios = 12.3(8)ya1
cisco / ios = 12.3(8)yd
cisco / ios = 12.3(8)yf
cisco / ios = 12.3(8)yg
cisco / ios = 12.3(8)yg1
cisco / ios = 12.3(8)yg2
cisco / ios = 12.3(8)yg3
cisco / ios = 12.3(8)yh
cisco / ios = 12.3(8)yi
cisco / ios = 12.3(8)yi1
cisco / ios = 12.3(8)yi3
cisco / ios = 12.3(9)
cisco / ios = 12.3(9a)bc
cisco / ios = 12.3(9a)bc2
cisco / ios = 12.3(9a)bc6
cisco / ios = 12.3(9a)bc7
cisco / ios = 12.3(9d)
cisco / ios = 12.3(9e)
cisco / ios = 12.3(10)
cisco / ios = 12.3(10c)
cisco / ios = 12.3(10d)
cisco / ios = 12.3(10e)
cisco / ios = 12.3(11)
cisco / ios = 12.3(11)t
cisco / ios = 12.3(11)t4
cisco / ios = 12.3(11)t5
cisco / ios = 12.3(11)t6
cisco / ios = 12.3(11)t8
cisco / ios = 12.3(11)t9
cisco / ios = 12.3(11)xl
cisco / ios = 12.3(11)xl3
cisco / ios = 12.3(11)yf
cisco / ios = 12.3(11)yf2
cisco / ios = 12.3(11)yf3
cisco / ios = 12.3(11)yf4
cisco / ios = 12.3(11)yj
cisco / ios = 12.3(11)yk
cisco / ios = 12.3(11)yk1
cisco / ios = 12.3(11)yk2
cisco / ios = 12.3(11)yl
cisco / ios = 12.3(11)yn
cisco / ios = 12.3(11)yr
cisco / ios = 12.3(11)ys
cisco / ios = 12.3(11)ys1
cisco / ios = 12.3(11)yw
cisco / ios = 12.3(12)
cisco / ios = 12.3(12b)
cisco / ios = 12.3(12e)
cisco / ios = 12.3(13)
cisco / ios = 12.3(13a)
cisco / ios = 12.3(13a)bc
cisco / ios = 12.3(13a)bc1
cisco / ios = 12.3(13b)
cisco / ios = 12.3(14)t
cisco / ios = 12.3(14)t2
cisco / ios = 12.3(14)t4
cisco / ios = 12.3(14)t5
cisco / ios = 12.3(14)ym4
cisco / ios = 12.3(14)yq
cisco / ios = 12.3(14)yq1
cisco / ios = 12.3(14)yq3
cisco / ios = 12.3(14)yq4
cisco / ios = 12.3(14)yt
cisco / ios = 12.3(14)yt1
cisco / ios = 12.3(14)yu
cisco / ios = 12.3(14)yu1
cisco / ios = 12.3(15)
cisco / ios = 12.3(15b)
cisco / ios = 12.3(16)
cisco / ios = 12.3b
cisco / ios = 12.3bc
cisco / ios = 12.3bw
cisco / ios = 12.3ja
cisco / ios = 12.3jk
cisco / ios = 12.3jx
cisco / ios = 12.3t
cisco / ios = 12.3tpc
cisco / ios = 12.3xa
cisco / ios = 12.3xb
cisco / ios = 12.3xc
cisco / ios = 12.3xd
cisco / ios = 12.3xe
cisco / ios = 12.3xf
cisco / ios = 12.3xg
cisco / ios = 12.3xh
cisco / ios = 12.3xi
cisco / ios = 12.3xj
cisco / ios = 12.3xk
cisco / ios = 12.3xl
cisco / ios = 12.3xm
cisco / ios = 12.3xn
cisco / ios = 12.3xq
cisco / ios = 12.3xr
cisco / ios = 12.3xs
cisco / ios = 12.3xt
cisco / ios = 12.3xu
cisco / ios = 12.3xv
cisco / ios = 12.3xw
cisco / ios = 12.3xx
cisco / ios = 12.3xy
cisco / ios = 12.3xz
cisco / ios = 12.3ya
cisco / ios = 12.3yb
cisco / ios = 12.3yc
cisco / ios = 12.3yd
cisco / ios = 12.3ye
cisco / ios = 12.3yf
cisco / ios = 12.3yg
cisco / ios = 12.3yh
cisco / ios = 12.3yi
cisco / ios = 12.3yj
cisco / ios = 12.3yk
cisco / ios = 12.3yl
cisco / ios = 12.3ym
cisco / ios = 12.3yn
cisco / ios = 12.3yq
cisco / ios = 12.3yr
cisco / ios = 12.3ys
cisco / ios = 12.3yt
cisco / ios = 12.3yu
cisco / ios = 12.3yw
cisco / ios = 12.3yx
cisco / ios = 12.4
cisco / ios = 12.4(1)
cisco / ios = 12.4(1b)
cisco / ios = 12.4(1c)
cisco / ios = 12.4(2)mr
cisco / ios = 12.4(2)mr1
cisco / ios = 12.4(2)t
cisco / ios = 12.4(2)t1
cisco / ios = 12.4(2)t2
cisco / ios = 12.4(2)xa
cisco / ios = 12.4(2)xb
cisco / ios = 12.4(3a)
cisco / ios = 12.4(3b)
cisco / ios = 12.4(4)t
cisco / ios = 12.4(5)
cisco / ios = 12.4mr
cisco / ios = 12.4t
cisco / ios = 12.4xa
cisco / ios = 12.4xb

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.