CVE-2010-0577

CVE-2010-0577 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.1. 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-399.

Key facts

• Severity: High (CVSS 2.0 base score 7.1)
• EPSS exploit prediction: 3% (83rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Cisco Ios
• Published: 2010-03-25
• Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2010-0577?

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.

How severe is CVE-2010-0577?

CVE-2010-0577 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2010-0577 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0577?

CVE-2010-0577 primarily affects Cisco Ios. In total, 136 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0577?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2010-0577 published?

CVE-2010-0577 was published on 2010-03-25 and last updated on 2026-06-16.

References

• http://osvdb.org/63178
• http://secunia.com/advisories/39078
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080b20f34.shtml
• http://www.securityfocus.com/bid/38930
• http://www.securitytracker.com/id?1023743
• http://www.vupen.com/english/advisories/2010/0703
• https://exchange.xforce.ibmcloud.com/vulnerabilities/57129

Affected products (136)

• cpe:2.3:o:cisco:ios:12.2b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2bc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2bx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2by:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2bz:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2cx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2cy:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2cz:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2jx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2mc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2t:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2tpc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xj:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xk:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xl:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xm:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xr:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xw:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2ya:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yf:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yg:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yh:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yj:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yl:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2ym:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yn:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yp:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yq:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yr:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yt:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yu:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yv:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yw:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2yy:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2zb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2zc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2zd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2ze:*:*:*:*:*:*:*

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