Vulnerability Database

393,557

Total vulnerabilities in the database

CVE-2010-0577 — cisco / ios

Resource Management Errors

Cisco IOS 12.2 through 12.4, when certain PMTUD, SNAT, or window-size configurations are used, allows remote attackers to cause a denial of service (infinite loop, and device reload or hang) via a TCP segment with crafted options, aka Bug ID CSCsz75186.

  • Published: Mar 25, 2010
  • Updated: Oct 4, 2026
  • CVE: CVE-2010-0577
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v2:

  • Severity: High
  • Score: 7.1
  • AV:N/AC:M/Au:N/C:N/I:N/A:C

CWEs:

Software Affected versions
cisco / ios = 12.2b
cisco / ios = 12.2bc
cisco / ios = 12.2bx
cisco / ios = 12.2by
cisco / ios = 12.2bz
cisco / ios = 12.2cx
cisco / ios = 12.2cy
cisco / ios = 12.2cz
cisco / ios = 12.2jx
cisco / ios = 12.2mc
cisco / ios = 12.2t
cisco / ios = 12.2tpc
cisco / ios = 12.2xj
cisco / ios = 12.2xk
cisco / ios = 12.2xl
cisco / ios = 12.2xm
cisco / ios = 12.2xr
cisco / ios = 12.2xw
cisco / ios = 12.2ya
cisco / ios = 12.2yb
cisco / ios = 12.2yd
cisco / ios = 12.2yf
cisco / ios = 12.2yg
cisco / ios = 12.2yh
cisco / ios = 12.2yj
cisco / ios = 12.2yl
cisco / ios = 12.2ym
cisco / ios = 12.2yn
cisco / ios = 12.2yp
cisco / ios = 12.2yq
cisco / ios = 12.2yr
cisco / ios = 12.2yt
cisco / ios = 12.2yu
cisco / ios = 12.2yv
cisco / ios = 12.2yw
cisco / ios = 12.2yy
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 = 12.3
cisco / ios = 12.3b
cisco / ios = 12.3bc
cisco / ios = 12.3bw
cisco / ios = 12.3ja
cisco / ios = 12.3jea
cisco / ios = 12.3jeb
cisco / ios = 12.3jec
cisco / ios = 12.3jed
cisco / ios = 12.3jk
cisco / ios = 12.3jl
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 = 12.3xi
cisco / ios = 12.3xj
cisco / ios = 12.3xk
cisco / ios = 12.3xl
cisco / ios = 12.3xq
cisco / ios = 12.3xr
cisco / ios = 12.3xs
cisco / ios = 12.3xu
cisco / ios = 12.3xw
cisco / ios = 12.3xx
cisco / ios = 12.3xy
cisco / ios = 12.3xz
cisco / ios = 12.3ya
cisco / ios = 12.3yd
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 = 12.3ym
cisco / ios = 12.3yq
cisco / ios = 12.3ys
cisco / ios = 12.3yt
cisco / ios = 12.3yu
cisco / ios = 12.3yx
cisco / ios = 12.3yz
cisco / ios = 12.3za
cisco / ios = 12.4
cisco / ios = 12.4gc
cisco / ios = 12.4ja
cisco / ios = 12.4jda
cisco / ios = 12.4jdc
cisco / ios = 12.4jdd
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 = 12.4mda
cisco / ios = 12.4mr
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 = 12.4xq
cisco / ios = 12.4xr
cisco / ios = 12.4xt
cisco / ios = 12.4xv
cisco / ios = 12.4xw
cisco / ios = 12.4xy
cisco / ios = 12.4xz
cisco / ios = 12.4ya
cisco / ios = 12.4yb
cisco / ios = 12.4yd
cisco / ios = 12.4ye
cisco / ios = 12.4yg

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.