What’s Vulnerable › Vulnerabilities

CVE-2010-2835

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2010-09-23 · updated 2026-06-16

Description

Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5), 7.0 before 7.0(2a)su3, 7.1su before 7.1(3b)su2, 7.1 before 7.1(5), and 8.0 before 8.0(1) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a SIP REFER request with an invalid Refer-To header, aka Bug IDs CSCta20040 and CSCta31358.

Affected products

• Cisco IOS: 12.1, 12.1t, 12.1xi, 12.1xj, 12.1xl, 12.1xm (+185)
• Cisco IOS XE: 2.5.0, 2.5.1, 2.6.0, 2.6.1
• Cisco Unified Communications Manager: 6.0, 6.0(1.2114.1), 6.0(1.2121.1), 6.0(1b), 6.1(1), 6.1(1a) (+31)

References

• http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a313.shtml
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a313.shtml

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