Vulnerability Database

393,392

Total vulnerabilities in the database

CVE-2009-0629 — cisco / ios

The (1) Airline Product Set (aka ALPS), (2) Serial Tunnel Code (aka STUN), (3) Block Serial Tunnel Code (aka BSTUN), (4) Native Client Interface Architecture (NCIA) support, (5) Data-link switching (aka DLSw), (6) Remote Source-Route Bridging (RSRB), (7) Point to Point Tunneling Protocol (PPTP), (8) X.25 for Record Boundary Preservation (RBP), (9) X.25 over TCP (XOT), and (10) X.25 Routing features in Cisco IOS 12.2 and 12.4 allows remote attackers to cause a denial of service (device reload) via a series of crafted TCP packets.

  • Published: Mar 27, 2009
  • Updated: Oct 3, 2026
  • CVE: CVE-2009-0629
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: Medium
  • Score: 5.4
  • AV:N/AC:H/Au:N/C:N/I:N/A:C

No CWE or OWASP classifications available.

Software Affected versions
cisco / ios = 12.2
cisco / ios = 12.2b
cisco / ios = 12.2bc
cisco / ios = 12.2bw
cisco / ios = 12.2bx
cisco / ios = 12.2by
cisco / ios = 12.2bz
cisco / ios = 12.2ca
cisco / ios = 12.2cx
cisco / ios = 12.2cy
cisco / ios = 12.2cz
cisco / ios = 12.2da
cisco / ios = 12.2dd
cisco / ios = 12.2dx
cisco / ios = 12.2ew
cisco / ios = 12.2ewa
cisco / ios = 12.2ex
cisco / ios = 12.2ey
cisco / ios = 12.2ez
cisco / ios = 12.2fx
cisco / ios = 12.2fy
cisco / ios = 12.2fz
cisco / ios = 12.2irb
cisco / ios = 12.2ixa
cisco / ios = 12.2ixb
cisco / ios = 12.2ixc
cisco / ios = 12.2ixd
cisco / ios = 12.2ixe
cisco / ios = 12.2ixf
cisco / ios = 12.2ixg
cisco / ios = 12.2ja
cisco / ios = 12.2jk
cisco / ios = 12.2l
cisco / ios = 12.2mb
cisco / ios = 12.2mc
cisco / ios = 12.2rc
cisco / ios = 12.2s
cisco / ios = 12.2sb
cisco / ios = 12.2sbc
cisco / ios = 12.2sca
cisco / ios = 12.2sga
cisco / ios = 12.2sm
cisco / ios = 12.2so
cisco / ios = 12.2sr
cisco / ios = 12.2sra
cisco / ios = 12.2srb
cisco / ios = 12.2src
cisco / ios = 12.2su
cisco / ios = 12.2sv
cisco / ios = 12.2sva
cisco / ios = 12.2svc
cisco / ios = 12.2svd
cisco / ios = 12.2sve
cisco / ios = 12.2sw
cisco / ios = 12.2sx
cisco / ios = 12.2sxa
cisco / ios = 12.2sxb
cisco / ios = 12.2sxd
cisco / ios = 12.2sxe
cisco / ios = 12.2sxf
cisco / ios = 12.2sy
cisco / ios = 12.2sz
cisco / ios = 12.2t
cisco / ios = 12.2tpc
cisco / ios = 12.2xa
cisco / ios = 12.2xb
cisco / ios = 12.2xc
cisco / ios = 12.2xd
cisco / ios = 12.2xe
cisco / ios = 12.2xf
cisco / ios = 12.2xg
cisco / ios = 12.2xh
cisco / ios = 12.2xi
cisco / ios = 12.2xj
cisco / ios = 12.2xk
cisco / ios = 12.2xl
cisco / ios = 12.2xm
cisco / ios = 12.2xn
cisco / ios = 12.2xo
cisco / ios = 12.2xq
cisco / ios = 12.2xr
cisco / ios = 12.2xs
cisco / ios = 12.2xt
cisco / ios = 12.2xu
cisco / ios = 12.2xv
cisco / ios = 12.2xw
cisco / ios = 12.2ya
cisco / ios = 12.2yb
cisco / ios = 12.2yc
cisco / ios = 12.2yd
cisco / ios = 12.2ye
cisco / ios = 12.2yf
cisco / ios = 12.2yg
cisco / ios = 12.2yh
cisco / ios = 12.2yj
cisco / ios = 12.2yk
cisco / ios = 12.2yl
cisco / ios = 12.2ym
cisco / ios = 12.2yn
cisco / ios = 12.2yo
cisco / ios = 12.2yp
cisco / ios = 12.2yq
cisco / ios = 12.2yr
cisco / ios = 12.2ys
cisco / ios = 12.2yt
cisco / ios = 12.2yu
cisco / ios = 12.2yv
cisco / ios = 12.2yw
cisco / ios = 12.2yx
cisco / ios = 12.2yy
cisco / ios = 12.2yz
cisco / ios = 12.2za
cisco / ios = 12.2zb
cisco / ios = 12.2zc
cisco / ios = 12.2zd
cisco / ios = 12.2ze
cisco / ios = 12.2zf
cisco / ios = 12.2zg
cisco / ios = 12.2zh
cisco / ios = 12.2zj
cisco / ios = 12.2zl
cisco / ios = 12.2zp
cisco / ios = 12.2zu
cisco / ios = 12.2zx
cisco / ios = 12.2zy
cisco / ios = 12.2zya
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)t3
cisco / ios = 12.4(2)t4
cisco / ios = 12.4(2)xa
cisco / ios = 12.4(2)xb
cisco / ios = 12.4(2)xb2
cisco / ios = 12.4(3)
cisco / ios = 12.4(3)t2
cisco / ios = 12.4(3a)
cisco / ios = 12.4(3b)
cisco / ios = 12.4(3d)
cisco / ios = 12.4(4)mr
cisco / ios = 12.4(4)t
cisco / ios = 12.4(4)t2
cisco / ios = 12.4(5)
cisco / ios = 12.4(5b)
cisco / ios = 12.4(6)t
cisco / ios = 12.4(6)t1
cisco / ios = 12.4(7)
cisco / ios = 12.4(7a)
cisco / ios = 12.4(8)
cisco / ios = 12.4(9)t
cisco / ios = 12.4(23)
cisco / ios = 12.4ja
cisco / ios = 12.4jda
cisco / ios = 12.4jk
cisco / ios = 12.4jl
cisco / ios = 12.4jma
cisco / ios = 12.4jmb
cisco / ios = 12.4jx
cisco / ios = 12.4md
cisco / ios = 12.4mr
cisco / ios = 12.4s
cisco / ios = 12.4sw
cisco / ios = 12.4t
cisco / ios = 12.4xa
cisco / ios = 12.4xb
cisco / ios = 12.4xc
cisco / ios = 12.4xd
cisco / ios = 12.4xe
cisco / ios = 12.4xf
cisco / ios = 12.4xg
cisco / ios = 12.4xj
cisco / ios = 12.4xk
cisco / ios = 12.4xl
cisco / ios = 12.4xm
cisco / ios = 12.4xn
cisco / ios = 12.4xp
cisco / ios = 12.4xt
cisco / ios = 12.4xv
cisco / ios = 12.4xw
cisco / ios = 12.4xy
cisco / ios_xr = 12.4

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.