Cisco Unified Computing System up to 6.0(1.250194) Web-based Management Interface out-of-bounds write

Summaryinfo

A vulnerability classified as critical has been found in Cisco Unified Computing System. Affected by this vulnerability is an unknown functionality of the component Web-based Management Interface. Performing a manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2026-20097. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Cisco Unified Computing System. This affects some unknown processing of the component Web-based Management Interface. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with admin-level privileges to execute arbitrary code as the root user. This vulnerability is due to improper validation of user-supplied input to the web-based management interface. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user. Cisco has assigned this vulnerability a SIR of High rather than Medium as the score indicates because additional security implications could occur when the attacker becomes root.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20097 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/01/2026).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Virtualization Software

Vendor

• Cisco

Name

• Unified Computing System

Version

• 3.1(1d)
• 3.1(2b)
• 3.1(2c)
• 3.1(2d)
• 3.1(2e)
• 3.1(2g)
• 3.1(2i)
• 3.1(3a)
• 3.1(3b)
• 3.1(3c)
• 3.1(3d)
• 3.1(3g)
• 3.1(3h)
• 3.1(3i)
• 3.1(3j)
• 3.1(3k)
• 4.0(1.240)
• 4.0(1a)
• 4.0(1b)
• 4.0(1c)
• 4.0(1d)
• 4.0(1e)
• 4.0(1g)
• 4.0(1h)
• 4.0(2c)
• 4.0(2d)
• 4.0(2f)
• 4.0(2g)
• 4.0(2h)
• 4.0(2i)
• 4.0(2l)
• 4.0(2n)
• 4.0(2o)
• 4.0(2p)
• 4.0(2q)
• 4.0(2r)
• 4.0(4b)
• 4.0(4c)
• 4.0(4d)
• 4.0(4e)
• 4.0(4f)
• 4.0(4h)
• 4.0(4i)
• 4.0(4k)
• 4.0(4l)
• 4.0(4m)
• 4.0(4n)
• 4.1(1c)
• 4.1(1d)
• 4.1(1f)
• 4.1(1g)
• 4.1(1h)
• 4.1(2a)
• 4.1(2b)
• 4.1(2d)
• 4.1(2e)
• 4.1(2f)
• 4.1(2g)
• 4.1(2h)
• 4.1(2j)
• 4.1(2k)
• 4.1(2l)
• 4.1(2m)
• 4.1(3b)
• 4.1(3c)
• 4.1(3d)
• 4.1(3f)
• 4.1(3h)
• 4.1(3i)
• 4.1(3l)
• 4.1(3m)
• 4.1(3n)
• 4.2(1a)
• 4.2(1b)
• 4.2(1c)
• 4.2(1e)
• 4.2(1f)
• 4.2(1g)
• 4.2(1i)
• 4.2(1j)
• 4.2(2a)
• 4.2(2f)
• 4.2(2g)
• 4.2(3b)
• 4.2(3d)
• 4.2(3e)
• 4.2(3g)
• 4.2(3h)
• 4.2(3i)
• 4.2(3j)
• 4.2(3l)
• 4.2(3m)
• 4.2(3n)
• 4.2(3o)
• 4.2(3p)
• 4.3(1.230097)
• 4.3(1.230124)
• 4.3(1.230138)
• 4.3(2.230207)
• 4.3(2.230270)
• 4.3(2.240002)
• 4.3(2.240009)
• 4.3(2.240037)
• 4.3(2.240053)
• 4.3(2.240077)
• 4.3(2.240090)
• 4.3(2.240107)
• 4.3(2.250016)
• 4.3(2.250021)
• 4.3(2.250022)
• 4.3(2.250037)
• 4.3(2.250045)
• 4.3(2.250063)
• 4.3(3.240022)
• 4.3(3.240043)
• 4.3(4.240142)
• 4.3(4.240152)
• 4.3(4.241014)
• 4.3(4.241063)
• 4.3(4.242028)
• 4.3(4.242038)
• 4.3(4.242066)
• 4.3(4.252001)
• 4.3(4.252002)
• 4.3(5.240021)
• 4.3(5.250001)
• 4.3(5.250030)
• 4.3(5.250033)
• 4.3(5.250043)
• 4.3(5.250045)
• 4.3(6.250039)
• 4.3(6.250040)
• 4.3(6.250044)
• 4.3(6.250053)
• 4.3(6.250060)
• 4.3(6.250101)
• 4.3(6.250117)
• 4.3(6.260003)
• 6.0(1.250127)
• 6.0(1.250130)
• 6.0(1.250131)
• 6.0(1.250174)
• 6.0(1.250192)
• 6.0(1.250194)

License

• commercial

Website

• Vendor: https://www.cisco.com/

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