CVE-2025-20160High· 8.1▾ TwilightA vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication. This vulnerability exists …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
Last analysed / modified upstream
A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication.
This vulnerability exists because the system does not properly check whether the required TACACS+ shared secret is configured. A machine-in-the-middle attacker could exploit this vulnerability by intercepting and reading unencrypted TACACS+ messages or impersonating the TACACS+ server and falsely accepting arbitrary authentication requests. A successful exploit could allow the attacker to view sensitive information in a TACACS+ message or bypass authentication and gain access to the affected device.
ios = 15.2(4)e6ios = 15.2(4)e7ios = 15.2(4)e8ios = 15.2(4)e9ios = 15.2(4)e10ios = 15.2(4)e10aios = 15.2(4)e10dios = 15.2(6)e1ios = 15.2(6)e2ios = 15.2(6)e2aios = 15.2(6)e2bios = 15.2(6)e3ios = 15.2(6)ebios = 15.2(7)eios = 15.2(7)e0aios = 15.2(7)e0bios = 15.2(7)e0sios = 15.2(7)e1ios = 15.2(7)e1aios = 15.2(7)e2ios = 15.2(7)e2aios = 15.2(7)e3ios = 15.2(7)e3kios = 15.2(7)e4ios = 15.2(7)e5ios = 15.2(7)e6ios = 15.2(7)e7ios = 15.2(7)e8ios = 15.2(7)e9ios = 15.2(7)e10ios = 15.2(7)e11ios = 15.2(7)e12ios = 15.2(7a)e0bios = 15.2(7b)e0bios = 15.2(8)eios = 15.2(8)e1ios = 15.2(8)e2ios = 15.2(8)e3ios = 15.2(8)e4ios = 15.2(8)e5ios = 15.2(8)e6ios = 15.2(8)e7ios = 15.5(1)sy2ios = 15.5(1)sy3ios = 15.5(1)sy4ios = 15.5(1)sy5ios = 15.5(1)sy6ios = 15.5(1)sy7ios = 15.5(1)sy8ios = 15.5(1)sy9ios = 15.5(1)sy10ios = 15.5(1)sy11ios = 15.5(1)sy12ios = 15.5(1)sy13ios = 15.5(1)sy14ios = 15.5(1)sy15ios = 15.5(3)m7ios = 15.5(3)m8ios = 15.5(3)m9ios = 15.5(3)m10ios = 15.5(3)s8ios = 15.5(3)s9ios = 15.5(3)s9aios = 15.5(3)s10ios = 15.6(2)sp5ios = 15.6(2)sp6ios = 15.6(2)sp7ios = 15.6(2)sp8ios = 15.6(2)sp9ios = 15.6(3)m4ios = 15.6(3)m5ios = 15.6(3)m6ios = 15.6(3)m6aios = 15.6(3)m6bios = 15.6(3)m7ios = 15.6(3)m8ios = 15.6(3)m9ios = 15.7(3)m2ios = 15.7(3)m3ios = 15.7(3)m4ios = 15.7(3)m4aios = 15.7(3)m4bios = 15.7(3)m5ios = 15.7(3)m6ios = 15.7(3)m7ios = 15.7(3)m8ios = 15.7(3)m9ios = 15.8(3)mios = 15.8(3)m0aios = 15.8(3)m0bios = 15.8(3)m1ios = 15.8(3)m1aios = 15.8(3)m2ios = 15.8(3)m2aios = 15.8(3)m3ios = 15.8(3)m3aios = 15.8(3)m3bios = 15.8(3)m4ios = 15.8(3)m5ios = 15.8(3)m6Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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