CVE-2023-20109Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability

A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute arbitrary code on an affected device or cause the device to crash. This vulnerability is due to insufficient validation of attributes in the Group Domain of Interpretation (GDOI) and G-IKEv2 protocols of the GET VPN feature. An attacker could exploit this vulnerability by either compromising an installed key server or modifying the configuration of a group member to point to a key server that is controlled by the attacker. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a denial of service (DoS) condition. For more information, see the Details ["#details"] section of this advisory.

6.6 MEDIUMEPSS 2.50%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 05:29 UTC

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
6.6	MEDIUM	3.1cisco (CNA)	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA required action

⚡ Known exploited · remediation due Oct 31, 2023

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2023-20109
Status: Analyzed
Assigner (CNA): cisco
Published: Sep 27, 2023
Last modified: 2026-06-17 05:29 UTC
Weaknesses: CWE-787 · Out-of-bounds Write

Affected Products

As published by the CNA in the CVE record.

CiscoIOS674 version ranges

12.4(24)T
12.4(24)T3
12.4(22)T1
12.4(24)T5
12.4(24)T4
12.4(22)T
12.4(24)T8
12.4(24)T2
12.4(22)T5
12.4(22)T4
12.4(24)T1
12.4(24)T7
12.4(22)T3
12.4(24)T6
12.4(22)T2
12.4(24)T4a
12.4(24)T4b
12.4(24)T3e
12.4(24)T4c
12.4(24)T4d
12.4(24)T4e
12.4(24)T3f
12.4(24)T4f
12.4(24)T4l
12.4(24)MD1
12.4(24)MD
12.4(24)MD3
12.4(24)MD2
12.4(22)MD1
12.4(22)MD2
12.4(24)MD5
12.4(22)MD
12.4(24)MD4
12.4(24)MD6
12.4(24)MD7
12.4(22)XR5
12.4(22)XR4
12.4(22)XR7
12.4(22)XR2
12.4(22)XR6
12.4(22)XR10
12.4(22)XR1
12.4(22)XR9
12.4(22)XR3
12.4(22)XR8
12.4(22)XR11
12.4(22)XR12
12.4(22)MDA3
12.4(24)MDA5
12.4(22)MDA5
12.4(24)MDA3
12.4(22)MDA4
12.4(24)MDA4
12.4(24)MDA1
12.4(22)MDA
12.4(22)MDA2
12.4(22)MDA1
12.4(24)MDA2
12.4(22)MDA6
12.4(24)MDA6
12.4(24)MDA7
12.4(24)MDA8
12.4(24)MDA10
12.4(24)MDA9
12.4(24)MDA11
12.4(24)MDA12
12.4(24)MDA13
12.4(24)YG3
12.4(24)YG4
12.4(24)YG1
12.4(24)YG2
12.4(24)YG
15.0(1)M1
15.0(1)M5
15.0(1)M4
15.0(1)M3
15.0(1)M2
15.0(1)M6
15.0(1)M
15.0(1)M7
15.0(1)M10
15.0(1)M9
15.0(1)M8
15.0(1)XA2
15.0(1)XA4
15.0(1)XA1
15.0(1)XA3
15.0(1)XA
15.0(1)XA5
15.1(2)T
15.1(1)T4
15.1(3)T2
15.1(1)T1
15.1(2)T0a
15.1(3)T3
15.1(1)T3
15.1(2)T3
15.1(2)T4
15.1(1)T2
15.1(3)T
15.1(2)T2a
15.1(3)T1
15.1(1)T
15.1(2)T2
15.1(2)T1
15.1(2)T5
15.1(3)T4
15.1(1)T5
15.1(1)XB
15.0(1)S2
15.0(1)S1
15.0(1)S
15.0(1)S3a
15.0(1)S4
15.0(1)S5
15.0(1)S4a
15.0(1)S6
15.2(1)S
15.2(2)S
15.2(1)S1
15.2(4)S
15.2(1)S2
15.2(2)S1
15.2(2)S2
15.2(2)S0a
15.2(2)S0c
15.2(4)S1
15.2(4)S4
15.2(4)S6
15.2(4)S2
15.2(4)S5
15.2(4)S3
15.2(4)S3a
15.2(4)S4a
15.2(4)S7
15.3(1)T
15.3(2)T
15.3(1)T1
15.3(1)T2
15.3(1)T3
15.3(1)T4
15.3(2)T1
15.3(2)T2
15.3(2)T3
15.3(2)T4
15.0(2)EY
15.0(2)EY1
15.0(2)EY2
15.0(2)EY3
15.1(2)S
15.1(1)S
15.1(1)S1
15.1(3)S
15.1(1)S2
15.1(2)S1
15.1(2)S2
15.1(3)S1
15.1(3)S0a
15.1(3)S2
15.1(3)S4
15.1(3)S3
15.1(3)S5
15.1(3)S6
15.1(3)S5a
15.1(4)M3
15.1(4)M
15.1(4)M1
15.1(4)M2
15.1(4)M6
15.1(4)M5
15.1(4)M4
15.1(4)M7
15.1(4)M3a
15.1(4)M10
15.1(4)M8
15.1(4)M9
15.0(2)SE
15.0(2)SE1
15.0(2)SE2
15.0(2)SE3
15.0(2)SE4
15.0(2)SE5
15.0(2)SE6
15.0(2)SE7
15.0(2)SE8
15.0(2)SE9
15.0(2)SE10
15.0(2)SE11
15.0(2)SE10a
15.0(2)SE12
15.0(2)SE13
15.1(2)GC
15.1(2)GC1
15.1(2)GC2
15.1(4)GC
15.1(4)GC1
15.1(4)GC2
15.1(1)SG
15.1(2)SG
15.1(1)SG1
15.1(1)SG2
15.1(2)SG1
15.1(2)SG2
15.1(2)SG3
15.1(2)SG4
15.1(2)SG5
15.1(2)SG6
15.1(2)SG7
15.1(2)SG8
15.0(1)MR
15.0(2)MR
15.2(4)M
15.2(4)M1
15.2(4)M2
15.2(4)M4
15.2(4)M3
15.2(4)M5
15.2(4)M8
15.2(4)M10
15.2(4)M7
15.2(4)M6
15.2(4)M9
15.2(4)M6a
15.2(4)M11
12.4(24)MDB
12.4(24)MDB1
12.4(24)MDB3
12.4(24)MDB4
12.4(24)MDB5
12.4(24)MDB6
12.4(24)MDB7
12.4(24)MDB5a
12.4(24)MDB8
12.4(24)MDB9
12.4(24)MDB10
12.4(24)MDB11
12.4(24)MDB12
12.4(24)MDB13
12.4(24)MDB14
12.4(24)MDB15
12.4(24)MDB16
12.4(24)MDB17
12.4(24)MDB18
12.4(24)MDB19
15.0(2)EX
15.0(2)EX1
15.0(2)EX2
15.0(2)EX3
15.0(2)EX4
15.0(2)EX5
15.0(2)EX8
15.0(2a)EX5
15.0(2)EX10
15.0(2)EX11
15.0(2)EX13
15.0(2)EX12
15.2(1)GC
15.2(1)GC1
15.2(1)GC2
15.2(2)GC
15.2(3)GC
15.2(3)GC1
15.2(4)GC
15.2(4)GC1
15.2(4)GC2
15.2(4)GC3
15.1(1)SY
15.1(1)SY1
15.1(2)SY
15.1(2)SY1
15.1(2)SY2
15.1(1)SY2
15.1(1)SY3
15.1(2)SY3
15.1(1)SY4
15.1(2)SY4
15.1(1)SY5
15.1(2)SY5
15.1(2)SY4a
15.1(1)SY6
15.1(2)SY6
15.1(2)SY7
15.1(2)SY8
15.1(2)SY9
15.1(2)SY10
15.1(2)SY11
15.1(2)SY12
15.1(2)SY13
15.1(2)SY14
15.1(2)SY15
15.1(2)SY16
15.3(1)S
15.3(2)S
15.3(3)S
15.3(1)S2
15.3(1)S1
15.3(2)S2
15.3(2)S1
15.3(3)S1
15.3(3)S2
15.3(3)S3
15.3(3)S6
15.3(3)S4
15.3(3)S1a
15.3(3)S5
15.3(3)S7
15.3(3)S8
15.3(3)S9
15.3(3)S10
15.3(3)S8a
15.4(1)T
15.4(2)T
15.4(1)T2
15.4(1)T1
15.4(1)T3
15.4(2)T1
15.4(2)T3
15.4(2)T2
15.4(1)T4
15.4(2)T4
15.0(2)EA
15.0(2)EA1
15.2(1)E
15.2(2)E
15.2(1)E1
15.2(3)E
15.2(1)E2
15.2(1)E3
15.2(2)E1
15.2(4)E
15.2(3)E1
15.2(2)E2
15.2(2a)E1
15.2(2)E3
15.2(2a)E2
15.2(3)E2
15.2(3a)E
15.2(3)E3
15.2(4)E1
15.2(2)E4
15.2(2)E5
15.2(4)E2
15.2(3)E4
15.2(5)E
15.2(4)E3
15.2(2)E6
15.2(5a)E
15.2(5)E1
15.2(5b)E
15.2(2)E5a
15.2(5c)E
15.2(3)E5
15.2(2)E5b
15.2(5a)E1
15.2(4)E4
15.2(2)E7
15.2(5)E2
15.2(6)E
15.2(5)E2b
15.2(4)E5
15.2(5)E2c
15.2(2)E8
15.2(6)E0a
15.2(6)E1
15.2(2)E7b
15.2(4)E5a
15.2(6)E0c
15.2(4)E6
15.2(6)E2
15.2(2)E9
15.2(4)E7
15.2(7)E
15.2(2)E10
15.2(4)E8
15.2(6)E2a
15.2(6)E2b
15.2(7)E1
15.2(7)E0a
15.2(7)E0b
15.2(7)E0s
15.2(6)E3
15.2(4)E9
15.2(7)E2
15.2(7a)E0b
15.2(4)E10
15.2(7)E3
15.2(7)E1a
15.2(7b)E0b
15.2(7)E2a
15.2(4)E10a
15.2(7)E4
15.2(7)E3k
15.2(8)E
15.2(8)E1
15.2(7)E5
15.2(7)E6
15.2(8)E2
15.2(4)E10d
15.2(7)E7
15.2(8)E3
15.2(7)E8
15.2(8)E4
15.1(3)MRA
15.1(3)MRA1
15.1(3)MRA2
15.1(3)MRA3
15.1(3)MRA4
15.1(3)SVB1
15.1(3)SVB2
15.4(1)S
15.4(2)S
15.4(3)S
15.4(1)S1
15.4(1)S2
15.4(2)S1
15.4(1)S3
15.4(3)S1
15.4(2)S2
15.4(3)S2
15.4(3)S3
15.4(1)S4
15.4(2)S3
15.4(2)S4
15.4(3)S4
15.4(3)S5
15.4(3)S6
15.4(3)S7
15.4(3)S6a
15.4(3)S8
15.4(3)S9
15.4(3)S10
15.3(3)M
15.3(3)M1
15.3(3)M2
15.3(3)M3
15.3(3)M5
15.3(3)M4
15.3(3)M6
15.3(3)M7
15.3(3)M8
15.3(3)M9
15.3(3)M10
15.3(3)M8a
15.0(2)EZ
15.1(3)SVD
15.1(3)SVD1
15.1(3)SVD2
15.2(1)EY
15.0(2)EJ
15.0(2)EJ1
15.2(1)SY
15.2(1)SY1
15.2(1)SY0a
15.2(1)SY2
15.2(2)SY
15.2(1)SY1a
15.2(2)SY1
15.2(2)SY2
15.2(1)SY3
15.2(1)SY4
15.2(2)SY3
15.2(1)SY5
15.2(1)SY6
15.2(1)SY7
15.2(1)SY8
15.2(5)EX
15.1(3)SVF
15.1(3)SVF1
15.1(3)SVE
15.4(3)M
15.4(3)M1
15.4(3)M2
15.4(3)M3
15.4(3)M4
15.4(3)M5
15.4(3)M6
15.4(3)M7
15.4(3)M6a
15.4(3)M8
15.4(3)M9
15.4(3)M10
15.0(2)EK
15.0(2)EK1
15.4(1)CG
15.4(1)CG1
15.4(2)CG
15.5(1)S
15.5(2)S
15.5(1)S1
15.5(3)S
15.5(1)S2
15.5(1)S3
15.5(2)S1
15.5(2)S2
15.5(3)S1
15.5(3)S1a
15.5(2)S3
15.5(3)S2
15.5(3)S0a
15.5(3)S3
15.5(1)S4
15.5(2)S4
15.5(3)S4
15.5(3)S5
15.5(3)S6
15.5(3)S6a
15.5(3)S7
15.5(3)S6b
15.5(3)S8
15.5(3)S9
15.5(3)S10
15.5(3)S9a
15.1(3)SVG
15.2(2)EB
15.2(2)EB1
15.2(2)EB2
15.2(6)EB
15.5(1)T
15.5(1)T1
15.5(2)T
15.5(1)T2
15.5(1)T3
15.5(2)T1
15.5(2)T2
15.5(2)T3
15.5(2)T4
15.5(1)T4
15.2(2)EA
15.2(2)EA1
15.2(2)EA2
15.2(3)EA
15.2(4)EA
15.2(4)EA1
15.2(2)EA3
15.2(4)EA3
15.2(5)EA
15.2(4)EA4
15.2(4)EA5
15.2(4)EA6
15.2(4)EA7
15.2(4)EA8
15.2(4)EA9
15.2(4)EA9a
15.5(3)M
15.5(3)M1
15.5(3)M0a
15.5(3)M2
15.5(3)M3
15.5(3)M4
15.5(3)M4a
15.5(3)M5
15.5(3)M6
15.5(3)M7
15.5(3)M6a
15.5(3)M8
15.5(3)M9
15.5(3)M10
15.5(3)SN
15.6(1)S
15.6(2)S
15.6(2)S1
15.6(1)S1
15.6(1)S2
15.6(2)S2
15.6(1)S3
15.6(2)S3
15.6(1)S4
15.6(2)S4
15.6(1)T
15.6(2)T
15.6(1)T0a
15.6(1)T1
15.6(2)T1
15.6(1)T2
15.6(2)T2
15.6(1)T3
15.6(2)T3
15.3(1)SY
15.3(1)SY1
15.3(1)SY2
15.6(2)SP
15.6(2)SP1
15.6(2)SP2
15.6(2)SP3
15.6(2)SP4
15.6(2)SP5
15.6(2)SP6
15.6(2)SP7
15.6(2)SP8
15.6(2)SP9
15.6(2)SP10
15.6(2)SN
15.6(3)M
15.6(3)M1
15.6(3)M0a
15.6(3)M1b
15.6(3)M2
15.6(3)M2a
15.6(3)M3
15.6(3)M3a
15.6(3)M4
15.6(3)M5
15.6(3)M6
15.6(3)M7
15.6(3)M6a
15.6(3)M6b
15.6(3)M8
15.6(3)M9
15.1(3)SVJ2
15.2(4)EC1
15.2(4)EC2
15.4(1)SY
15.4(1)SY1
15.4(1)SY2
15.4(1)SY3
15.4(1)SY4
15.5(1)SY
15.5(1)SY1
15.5(1)SY2
15.5(1)SY3
15.5(1)SY4
15.5(1)SY5
15.5(1)SY6
15.5(1)SY7
15.5(1)SY8
15.5(1)SY9
15.5(1)SY10
15.5(1)SY11
15.7(3)M
15.7(3)M1
15.7(3)M0a
15.7(3)M3
15.7(3)M2
15.7(3)M4
15.7(3)M5
15.7(3)M4a
15.7(3)M4b
15.7(3)M6
15.7(3)M7
15.7(3)M8
15.7(3)M9
15.8(3)M
15.8(3)M1
15.8(3)M0a
15.8(3)M0b
15.8(3)M2
15.8(3)M1a
15.8(3)M3
15.8(3)M2a
15.8(3)M4
15.8(3)M3a
15.8(3)M3b
15.8(3)M5
15.8(3)M6
15.8(3)M7
15.8(3)M8
15.8(3)M9
15.8(3)M10
15.9(3)M
15.9(3)M1
15.9(3)M0a
15.9(3)M2
15.9(3)M3
15.9(3)M2a
15.9(3)M3a
15.9(3)M4
15.9(3)M3b
15.9(3)M5
15.9(3)M4a
15.9(3)M6
15.9(3)M7
15.9(3)M6a
15.9(3)M6b
15.9(3)M7a

CiscoCisco IOS XE Software364 version ranges

3.7.0S
3.7.1S
3.7.2S
3.7.3S
3.7.4S
3.7.5S
3.7.6S
3.7.7S
3.7.4aS
3.7.2tS
3.7.0bS
3.7.1aS
3.3.0SG
3.3.2SG
3.3.1SG
3.8.0S
3.8.1S
3.8.2S
3.9.1S
3.9.0S
3.9.2S
3.9.1aS
3.9.0aS
3.4.0SG
3.4.2SG
3.4.1SG
3.4.3SG
3.4.4SG
3.4.5SG
3.4.6SG
3.4.7SG
3.4.8SG
3.5.0E
3.5.1E
3.5.2E
3.5.3E
3.10.0S
3.10.1S
3.10.2S
3.10.3S
3.10.4S
3.10.5S
3.10.6S
3.10.2tS
3.10.7S
3.10.1xbS
3.10.8S
3.10.8aS
3.10.9S
3.10.10S
3.11.1S
3.11.2S
3.11.0S
3.11.3S
3.11.4S
3.12.0S
3.12.1S
3.12.2S
3.12.3S
3.12.0aS
3.12.4S
3.13.0S
3.13.1S
3.13.2S
3.13.3S
3.13.4S
3.13.5S
3.13.2aS
3.13.0aS
3.13.5aS
3.13.6S
3.13.7S
3.13.6aS
3.13.7aS
3.13.8S
3.13.9S
3.13.10S
3.6.0E
3.6.1E
3.6.2aE
3.6.2E
3.6.3E
3.6.4E
3.6.5E
3.6.6E
3.6.5aE
3.6.5bE
3.6.7E
3.6.8E
3.6.7bE
3.6.9E
3.6.10E
3.14.0S
3.14.1S
3.14.2S
3.14.3S
3.14.4S
3.15.0S
3.15.1S
3.15.2S
3.15.1cS
3.15.3S
3.15.4S
3.16.0S
3.16.1S
3.16.1aS
3.16.2S
3.16.2aS
3.16.0cS
3.16.3S
3.16.2bS
3.16.3aS
3.16.4S
3.16.4aS
3.16.4bS
3.16.5S
3.16.4dS
3.16.6S
3.16.7S
3.16.6bS
3.16.7aS
3.16.7bS
3.16.8S
3.16.9S
3.16.10S
3.17.0S
3.17.1S
3.17.2S
3.17.1aS
3.17.3S
3.17.4S
16.1.1
16.1.2
16.1.3
16.2.1
16.2.2
3.8.0E
3.8.1E
3.8.2E
3.8.3E
3.8.4E
3.8.5E
3.8.5aE
3.8.6E
3.8.7E
3.8.8E
3.8.9E
3.8.10E
16.3.1
16.3.2
16.3.3
16.3.1a
16.3.4
16.3.5
16.3.5b
16.3.6
16.3.7
16.3.8
16.3.9
16.3.10
16.3.11
16.4.1
16.4.2
16.4.3
16.5.1
16.5.1a
16.5.1b
16.5.2
16.5.3
3.18.0aS
3.18.0S
3.18.1S
3.18.2S
3.18.3S
3.18.4S
3.18.0SP
3.18.1SP
3.18.1aSP
3.18.1bSP
3.18.1cSP
3.18.2SP
3.18.2aSP
3.18.3SP
3.18.4SP
3.18.3aSP
3.18.3bSP
3.18.5SP
3.18.6SP
3.18.7SP
3.18.8aSP
3.18.9SP
3.9.0E
3.9.1E
3.9.2E
16.6.1
16.6.2
16.6.3
16.6.4
16.6.5
16.6.4a
16.6.5a
16.6.6
16.6.7
16.6.8
16.6.9
16.6.10
16.7.1
16.7.1a
16.7.1b
16.7.2
16.7.3
16.7.4
16.8.1
16.8.1a
16.8.1b
16.8.1s
16.8.1c
16.8.1d
16.8.2
16.8.1e
16.8.3
16.9.1
16.9.2
16.9.1a
16.9.1b
16.9.1s
16.9.3
16.9.4
16.9.3a
16.9.5
16.9.5f
16.9.6
16.9.7
16.9.8
16.10.1
16.10.1a
16.10.1b
16.10.1s
16.10.1c
16.10.1e
16.10.1d
16.10.2
16.10.1f
16.10.1g
16.10.3
3.10.0E
3.10.1E
3.10.0cE
3.10.2E
3.10.3E
16.11.1
16.11.1a
16.11.1b
16.11.2
16.11.1s
16.12.1
16.12.1s
16.12.1a
16.12.1c
16.12.1w
16.12.2
16.12.1y
16.12.2a
16.12.3
16.12.8
16.12.2s
16.12.1x
16.12.1t
16.12.4
16.12.3s
16.12.3a
16.12.4a
16.12.5
16.12.6
16.12.1z1
16.12.5a
16.12.5b
16.12.1z2
16.12.6a
16.12.7
16.12.9
3.11.0E
3.11.1E
3.11.2E
3.11.3E
3.11.1aE
3.11.4E
3.11.3aE
3.11.5E
3.11.6E
3.11.7E
3.11.8E
17.1.1
17.1.1a
17.1.1s
17.1.1t
17.1.3
17.2.1
17.2.1r
17.2.1a
17.2.1v
17.2.2
17.2.3
17.3.1
17.3.2
17.3.3
17.3.1a
17.3.1w
17.3.2a
17.3.1x
17.3.1z
17.3.4
17.3.5
17.3.4a
17.3.6
17.3.4b
17.3.4c
17.3.5a
17.3.5b
17.3.7
17.4.1
17.4.2
17.4.1a
17.4.1b
17.4.2a
17.5.1
17.5.1a
17.5.1c
17.6.1
17.6.2
17.6.1w
17.6.1a
17.6.1x
17.6.3
17.6.1y
17.6.1z
17.6.3a
17.6.4
17.6.1z1
17.6.5
17.6.5a
17.7.1
17.7.1a
17.7.1b
17.7.2
17.10.1
17.10.1a
17.10.1b
17.8.1
17.8.1a
17.9.1
17.9.1w
17.9.2
17.9.1a
17.9.1x
17.9.1y
17.9.3
17.9.2a
17.9.1x1
17.9.3a
17.9.1y1
17.11.1
17.11.1a
17.11.99SW

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-07 14:25 UTC.