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
Published Sep 23, 2010
7.8
HIGHCVSS 2.0
EPSS 1.79%
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
No data.
Configuration 1
- 12.1
- 12.1t
- 12.1xi
- 12.1xj
- 12.1xl
- 12.1xm
- 12.1xp
- 12.1xq
- 12.1xr
- 12.1xs
- 12.1xt
- 12.1xu
- 12.1xv
- 12.1xy
- 12.1ya
- 12.1yb
- 12.1yc
- 12.1yd
- 12.1ye
- 12.1yf
- 12.1yh
- 12.1yi
- 12.2b
- 12.2bw
- 12.2bx
- 12.2by
- 12.2cz
- 12.2dd
- 12.2dx
- 12.2ex
- 12.2ira
- 12.2irb
- 12.2irc
- 12.2ird
- 12.2ire
- 12.2ixa
- 12.2ixb
- 12.2ixc
- 12.2ixd
- 12.2ixe
- 12.2ixf
- 12.2ixg
- 12.2ixh
- 12.2mra
- 12.2mrb
- 12.2sbc
- 12.2sca
- 12.2scb
- 12.2scc
- 12.2scd
- 12.2sg
- 12.2sra
- 12.2srb
- 12.2sre
- 12.2su
- 12.2sv
- 12.2sxa
- 12.2sxb
- 12.2sxd
- 12.2sxe
- 12.2sxf
- 12.2sy
- 12.2sz
- 12.2t
- 12.2tpc
- 12.2xa
- 12.2xb
- 12.2xc
- 12.2xd
- 12.2xg
- 12.2xh
- 12.2xi
- 12.2xj
- 12.2xk
- 12.2xl
- 12.2xm
- 12.2xn
- 12.2xq
- 12.2xs
- 12.2xt
- 12.2xu
- 12.2xv
- 12.2xw
- 12.2ya
- 12.2yb
- 12.2yc
- 12.2yd
- 12.2ye
- 12.2yf
- 12.2yh
- 12.2yj
- 12.2yk
- 12.2yl
- 12.2ym
- 12.2yn
- 12.2yt
- 12.2yu
- 12.2yv
- 12.2yw
- 12.2yx
- 12.2yy
- 12.2yz
- 12.2zc
- 12.2zd
- 12.2ze
- 12.2zf
- 12.2zh
- 12.2zj
- 12.2zl
- 12.2zp
- 12.2zu
- 12.2zy
- 12.2zya
- 12.3
- 12.3b
- 12.3t
- 12.3tpc
- 12.3va
- 12.3xa
- 12.3xb
- 12.3xc
- 12.3xd
- 12.3xe
- 12.3xf
- 12.3xg
- 12.3xi
- 12.3xj
- 12.3xk
- 12.3xl
- 12.3xq
- 12.3xr
- 12.3xs
- 12.3xu
- 12.3xw
- 12.3xx
- 12.3xy
- 12.3xz
- 12.3ya
- 12.3yd
- 12.3yf
- 12.3yg
- 12.3yh
- 12.3yi
- 12.3yj
- 12.3yk
- 12.3ym
- 12.3yq
- 12.3ys
- 12.3yt
- 12.3yu
- 12.3yx
- 12.3yz
- 12.3za
- 12.4
- 12.4gc
- 12.4md
- 12.4mda
- 12.4mr
- 12.4mra
- 12.4sw
- 12.4t
- 12.4xa
- 12.4xb
- 12.4xc
- 12.4xd
- 12.4xe
- 12.4xf
- 12.4xg
- 12.4xj
- 12.4xk
- 12.4xl
- 12.4xm
- 12.4xn
- 12.4xp
- 12.4xq
- 12.4xr
- 12.4xt
- 12.4xv
- 12.4xw
- 12.4xy
- 12.4xz
- 12.4ya
- 12.4yb
- 12.4yd
- 12.4ye
- 12.4yg
- 15.0m
- 15.0s
- 15.0xa
- 15.1t
- 15.1xb
- 2.5.0
- 2.5.1
- 2.6.0
- 2.6.1
Configuration 2
- 6.0
- 6.0\(1.2114.1\)
- 6.0\(1.2121.1\)
- 6.0\(1b\)
- 6.1\(1\)
- 6.1\(1a\)
- 6.1\(1b\)
- 6.1\(2\)
- 6.1\(2\)su1
- 6.1\(2\)su1a
- 6.1\(3\)
- 6.1\(3a\)
- 6.1\(3b\)
- 6.1\(3b\)su1
- 6.1\(4\)
- 6.1\(4\)su1
- 6.1\(4a\)
- 6.1\(4a\)su2
- 7.0
- 7.0\(1\)
- 7.0\(1\)su1
- 7.0\(1\)su1a
- 7.0\(2\)
- 7.0\(2a\)
- 7.0\(2a\)su1
- 7.0\(2a\)su2
- 7.1\(2a\)
- 7.1\(2a\)su1
- 7.1\(2b\)
- 7.1\(2b\)su1
- 7.1\(3\)
- 7.1\(3a\)
- 7.1\(3a\)su1
- 7.1\(3a\)su1a
- 7.1\(3b\)
- 7.1\(3b\)su1
- 8.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.79% (0.01785) | 77.50th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.79% (0.01785) | 75.36th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.84% (0.00839) | 73.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.18% (0.00181) | 56.68th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.15% (0.00155) | 51.19th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.14% (0.00143) | 49.02th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.13% (0.00129) | 46.50th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00181) | 53.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
No CWE recorded.
References (2)
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml vendor-advisoryx_refsource_CISCOPatchVendor Advisory
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a313.shtml vendor-advisoryx_refsource_CISCOPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml | vendor-advisoryx_refsource_CISCOPatchVendor Advisory | |
| http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a313.shtml | vendor-advisoryx_refsource_CISCOPatchVendor Advisory |
Change history (0)
No recorded changes yet.