Summary
generated automatically from NVD dataCVE-2010-2835 affects Cisco IOS (12.2 through 12.4 and 15.0 through 15.1), Cisco IOS XE 2.5.x and 2.6.x, and several Cisco Unified Communications Manager (CUCM) 6.x, 7.x and 8.0 releases. A remote attacker can send a SIP REFER request with an invalid Refer-To header, causing a denial of service through a device reload or a voice-services outage. No authentication is needed. The flaw is rated CVSS v2.0 7.8 (HIGH), with availability as the only impact, and is tracked as Cisco Bug IDs CSCta20040 and CSCta31358.
NVD 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.
EPSS · FIRST.org
1.8%probability of exploitation in the next 30 days
Higher than 77% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-19, recomputed daily by FIRST.org.
CVSS v2.0 Score
Information
- Published
- 23 sept. 2010
- Updated
- 16 juin 2026
- Status
- Modified
- Source
- psirt@cisco.com
Affected products
Weaknesses (CWE)
References (4)
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