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CVE-2026-20125

HIGHCVSS 7.7/10EPSS 0.28%

Last modified

CVE-2026-20125 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malformed HTTP requests to an affected device. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malformed HTTP requests to an affected device. A successful exploit could allow the attacker to cause a watchdog timer to expire and the device to reload, resulting in a DoS condition. To exploit this vulnerability, the attacker must have a valid user account.

Metrics

CVSS 3.1
7.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
0.28%

19.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
CiscoIOS12.2(33)CY; 12.2(33)CY1; 12.2(33)CY2; 12.2(55)SE; 12.2(55)SE3; 12.2(55)SE2; 12.2(58)SE; 12.2(55)SE1; 12.2(58)SE1; 12.2(55)SE4; 12.2(58)SE2; 12.2(55)SE5; 12.2(55)SE6; 12.2(55)SE7; 12.2(55)SE8; 12.2(55)SE9; 12.2(55)SE10; 12.2(55)SE11; 12.2(55)SE12; 12.2(55)SE13; 12.2(25)EZ; 12.2(25)EZ1; 12.2(58)EZ; 12.2(53)EZ; 12.2(55)EZ; 12.2(60)EZ; 12.2(60)EZ1; 12.2(60)EZ2; 12.2(60)EZ3; 12.2(60)EZ4; 12.2(60)EZ5; 12.2(60)EZ6; 12.2(60)EZ7; 12.2(60)EZ8; 12.2(60)EZ9; 12.2(60)EZ10; 12.2(60)EZ11; 12.2(60)EZ12; 12.2(60)EZ13; 12.2(60)EZ14; 12.2(60)EZ15; 12.2(33)SXI2; 12.2(33)SXI3; 12.2(33)SXI5; 12.2(33)SXI4a; 12.2(33)SXI4; 12.2(33)SXI2a; 12.2(33)SXI; 12.2(33)SXI6; 12.2(33)SXI7; 12.2(33)SXI1; 12.2(33)SXI8; 12.2(33)SXI9; 12.2(33)SXI8a; 12.2(33)SXI10; 12.2(33)SXI11; 12.2(33)SXI12; 12.2(33)SXI13; 12.2(33)SXI14; 12.4(3)JK4; 12.4(3)JK1; 12.4(3)JK; 12.4(3)JK3; 12.4(3)JK2; 12.2(44)SQ; 12.2(44)SQ2; 12.2(50)SQ2; 12.2(50)SQ1; 12.2(50)SQ; 12.2(50)SQ3; 12.2(50)SQ4; 12.2(50)SQ5; 12.2(50)SQ6; 12.2(50)SQ7; 12.2(33)SRE1; 12.2(33)SRE2; 12.2(33)SRE3; 12.2(33)SRE4; 12.2(33)SRE; 12.2(33)SRE0a; 12.2(33)SRE5; 12.2(33)SRE6; 12.2(33)SRE8; 12.2(33)SRE7; 12.2(33)SRE9; 12.2(33)SRE7a; 12.2(33)SRE10; 12.2(33)SRE11; 12.2(33)SRE9a; 12.2(33)SRE12; 12.2(33)SRE13; 12.2(33)SRE14; 12.2(33)SRE15; 12.2(33)SRE15a; 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(1)EY; 15.0(1)EY1; 15.0(1)EY2; 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(1)SE; 15.0(2)SE; 15.0(1)SE1; 15.0(1)SE2; 15.0(1)SE3; 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; 15.0(1)SY; 15.0(1)SY1; 15.0(1)SY2; 15.0(1)SY3; 15.0(1)SY4; 15.0(1)SY5; 15.0(1)SY6; 15.0(1)SY7; 15.0(1)SY8; 15.0(1)SY7a; 15.0(1)SY9; 15.0(1)SY10; 12.2(33)SXJ; 12.2(33)SXJ1; 12.2(33)SXJ2; 12.2(33)SXJ3; 12.2(33)SXJ4; 12.2(33)SXJ5; 12.2(33)SXJ6; 12.2(33)SXJ7; 12.2(33)SXJ8; 12.2(33)SXJ9; 12.2(33)SXJ10; 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; 15.2(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; 15.0(2)SG; 15.0(2)SG1; 15.0(2)SG2; 15.0(2)SG3; 15.0(2)SG4; 15.0(2)SG5; 15.0(2)SG6; 15.0(2)SG7; 15.0(2)SG8; 15.0(2)SG9; 15.0(2)SG10; 15.0(2)SG11; 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; 15.2(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; 12.4(25d)JAX; 12.4(25d)JAX1; 12.4(25e)JAX; 12.4(25e)JAX1; 12.4(25e)JAX2; 12.2(33)SCG; 12.2(33)SCG1; 12.2(33)SCG2; 12.2(33)SCG3; 12.2(33)SCG4; 12.2(33)SCG5; 12.2(33)SCG6; 12.2(33)SCG7; 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; 12.4(25e)JAZ; 12.2(33)SCH; 12.2(33)SCH1; 12.2(33)SCH2; 12.2(33)SCH0a; 12.2(33)SCH3; 12.2(33)SCH2a; 12.2(33)SCH4; 12.2(33)SCH5; 12.2(33)SCH6; 12.4(25e)JAM; 12.4(25e)JAM2; 12.4(25e)JAM3; 12.4(25e)JAM4; 12.4(25e)JAM5; 12.4(25e)JAM6; 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(2)E5b; 15.2(5a)E1; 15.2(4)E4; 15.2(2)E7; 15.2(5)E2; 15.2(6)E; 15.2(4)E5; 15.2(5)E2c; 15.2(2)E8; 15.2(6)E0a; 15.2(6)E1; 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; 15.2(7)E9; 15.2(8)E5; 15.2(8)E6; 15.2(7)E10; 15.2(7)E11; 15.2(8)E7; 15.2(7)E12; 15.2(8)E8; 15.2(7)E13; 15.2(2)JB; 15.2(2)JB2; 15.2(4)JB; 15.2(2)JB3; 15.2(4)JB1; 15.2(4)JB2; 15.2(4)JB3; 15.2(4)JB3a; 15.2(2)JB4; 15.2(4)JB4; 15.2(4)JB3h; 15.2(4)JB3b; 15.2(4)JB3s; 15.2(4)JB5; 15.2(4)JB5m; 15.2(4)JB6; 15.2(2)JB5; 15.2(2)JB6; 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; 15.2(2)JAX; 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; 15.2(4)JN; 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; 12.4(25e)JAO; 12.4(25e)JAO1; 12.4(25e)JAO2; 12.4(25e)JAO3; 12.4(25e)JAO4; 12.4(25e)JAO5; 12.4(25e)JAO6; 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; 15.5(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; 15.3(3)JN3; 15.3(3)JN4; 15.3(3)JN7; 15.3(3)JN8; 15.3(3)JN9; 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; 12.2(33)SCI; 12.2(33)SCI1; 12.2(33)SCI1a; 12.2(33)SCI2; 12.2(33)SCI3; 12.2(33)SCI2a; 12.4(25e)JAP; 12.4(25e)JAP1; 12.4(25e)JAP4; 12.4(25e)JAP5; 12.4(25e)JAP6; 12.4(25e)JAP1n; 12.4(25e)JAP7; 12.4(25e)JAP8; 12.4(25e)JAP10; 12.4(25e)JAP11; 12.4(25e)JAP12; 15.3(3)JA; 15.3(3)JA1m; 15.3(3)JA1; 15.3(3)JA4; 15.3(3)JA5; 15.3(3)JA6; 15.3(3)JA7; 15.3(3)JA8; 15.3(3)JA10; 15.3(3)JA11; 15.3(3)JA12; 15.3(3)JAA; 15.3(3)JAA11; 15.3(3)JAA12; 15.3(3)JAB; 15.3(3)JB; 15.5(3)SN; 15.0(2)SQD; 15.0(2)SQD1; 15.0(2)SQD2; 15.0(2)SQD3; 15.0(2)SQD4; 15.0(2)SQD5; 15.0(2)SQD6; 15.0(2)SQD7; 15.0(2)SQD8; 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(3)JNB; 15.3(3)JNB1; 15.3(3)JNB2; 15.3(3)JNB3; 15.3(3)JNB4; 15.3(3)JNB6; 15.3(3)JNB5; 15.3(3)JAX; 15.3(3)JAX1; 15.3(3)JAX2; 15.3(3)JBB; 15.3(3)JBB1; 15.3(3)JBB2; 15.3(3)JBB4; 15.3(3)JBB5; 15.3(3)JBB6; 15.3(3)JBB8; 15.3(3)JBB6a; 15.3(3)JC; 15.3(3)JC1; 15.3(3)JC2; 15.3(3)JC3; 15.3(3)JC4; 15.3(3)JC5; 15.3(3)JC6; 15.3(3)JC8; 15.3(3)JC9; 15.3(3)JC14; 15.3(1)SY; 15.3(1)SY1; 15.3(1)SY2; 15.3(3)JNC; 15.3(3)JNC1; 15.3(3)JNC4; 12.2(33)SCJ; 12.2(33)SCJ1a; 12.2(33)SCJ2; 12.2(33)SCJ2a; 12.2(33)SCJ2b; 12.2(33)SCJ2c; 12.2(33)SCJ3; 12.2(33)SCJ4; 15.3(3)JNP; 15.3(3)JNP1; 15.3(3)JNP3; 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)SN; 15.3(3)JPB; 15.3(3)JPB1; 15.3(3)JD; 15.3(3)JD2; 15.3(3)JD3; 15.3(3)JD4; 15.3(3)JD5; 15.3(3)JD6; 15.3(3)JD7; 15.3(3)JD8; 15.3(3)JD9; 15.3(3)JD11; 15.3(3)JD13; 15.3(3)JD14; 15.3(3)JD16; 15.3(3)JD17; 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; 15.2(4)EC1; 15.2(4)EC2; 15.3(3)JPC; 15.3(3)JPC1; 15.3(3)JPC2; 15.3(3)JPC3; 15.3(3)JPC5; 15.3(3)JND; 15.3(3)JND1; 15.3(3)JND2; 15.3(3)JND3; 15.4(1)SY; 15.4(1)SY1; 15.4(1)SY2; 15.4(1)SY3; 15.4(1)SY4; 15.3(3)JE; 15.3(3)JPD; 15.3(3)JDA7; 15.3(3)JDA8; 15.3(3)JDA9; 15.3(3)JDA11; 15.3(3)JDA13; 15.3(3)JDA14; 15.3(3)JDA16; 15.3(3)JDA17; 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; 15.5(1)SY12; 15.5(1)SY13; 15.5(1)SY14; 15.5(1)SY15; 15.5(1)SY16; 15.3(3)JF; 15.3(3)JF1; 15.3(3)JF2; 15.3(3)JF4; 15.3(3)JF5; 15.3(3)JF6; 15.3(3)JF7; 15.3(3)JF8; 15.3(3)JF9; 15.3(3)JF10; 15.3(3)JF11; 15.3(3)JF12; 15.3(3)JF12i; 15.3(3)JF14; 15.3(3)JF14i; 15.3(3)JF15; 15.3(3)JCA7; 15.3(3)JCA8; 15.3(3)JCA9; 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; 15.3(3)JG; 15.3(3)JG1; 15.3(3)JH; 15.3(3)JH1; 15.3(3)JI1; 15.3(3)JI3; 15.3(3)JI4; 15.3(3)JI5; 15.3(3)JI6; 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; 15.9(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)M8; 15.9(3)M7a; 15.9(3)M9; 15.9(3)M8b; 15.9(3)M10; 15.9(3)M11; 15.9(3)M12; 15.3(3)JK; 15.3(3)JK1; 15.3(3)JK2; 15.3(3)JK3; 15.3(3)JK2a; 15.3(3)JK1t; 15.3(3)JK4; 15.3(3)JK5; 15.3(3)JK6; 15.3(3)JK7; 15.3(3)JK8; 15.3(3)JK8a; 15.3(3)JK8b; 15.3(3)JK9; 15.3(3)JK10; 15.3(3)JK11; 15.3(3)JJ; 15.3(3)JJ1; 15.3(3)JPI1; 15.3(3)JPI4; 15.3(3)JPI1t; 15.3(3)JPI5; 15.3(3)JPI7; 15.3(3)JPI6a; 15.3(3)JPI8a; 15.3(3)JPI9; 15.3(3)JPI10; 15.3(3)JPJ2; 15.3(3)JPJ3; 15.3(3)JPJ2t; 15.3(3)JPJ3a; 15.3(3)JPJ4; 15.3(3)JPJ5; 15.3(3)JPJ6; 15.3(3)JPJ7; 15.3(3)JPJ7c; 15.3(3)JPJ8a; 15.3(3)JPJ9; 15.3(3)JPJ10; 15.3(3)JPJ11; 15.3(3)JPK; 15.3(3)JPK1; 15.3(3)JPK2; 15.3(3)JPK3; 15.3(3)JPK4; 15.3(3)JPK5; 15.3(3)JPK6; 15.3(3)JPK7; 15.3(3)JPK8; 15.3(3)JPK9; 15.3(3)JPL; 15.3(3)JPM; 15.3(3)JPN; 15.3(3)JPN1; 15.3(3)JPN2; 15.3(3)JPN3; 15.3(3)JPN4; 15.3(3)JPN5; 15.3(3)JPN6; 15.3(3)JPN7; 15.3(3)JPO; 15.3(3)JPP; 15.3(3)JPQ; 15.3(3)JPQ1; 15.3(3)JPQ2; 15.3(3)JPQ3; 15.3(3)JPQ4; 15.3(3)JPQ5; 15.3(3)JPR; 15.3(3)JPS; 15.3(3)JPT; 15.3(3)JPT1; 15.3(3)JPT2; 15.3(3)JPT3
CiscoCisco IOS XE Software3.5.0E; 3.5.1E; 3.5.2E; 3.5.3E; 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; 3.6.7E; 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; 3.7.0E; 3.7.1E; 3.7.2E; 3.7.3E; 3.7.4E; 3.7.5E; 3.5.0SQ; 3.5.1SQ; 3.5.2SQ; 3.5.3SQ; 3.5.4SQ; 3.5.5SQ; 3.5.6SQ; 3.5.7SQ; 3.5.8SQ; 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; 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; 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; 3.10.0E; 3.10.1E; 3.10.0cE; 3.10.2E; 3.10.3E; 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; 3.11.9E; 3.11.10E; 3.11.11E; 3.11.12E; 3.11.13E

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-20125?
A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending malformed HTTP requests to an affected device. A successful exploit could allow the attacker to cause a watchdog timer to expire and the device to reload, resulting in a DoS condition. To exploit this vulnerability, the attacker must have a valid user account.
How severe is CVE-2026-20125?
CVE-2026-20125 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.
How do I fix CVE-2026-20125?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST