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ATT&CK matrix

T1008

Fallback Channels

13 CVEs mapped
TA0011Command and Control
Adversaries may use fallback or alternate communication channels if the primary channel is compromised or inaccessible in order to maintain reliable command and control and to avoid data transfer thresholds.

Platforms4

ESXiLinuxmacOSWindows

CVEs mapped to this technique13

CVEDescriptionSeverityEPSSFlagsModified
CVE-2017-7921

An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 160530, DS-2CD2xx0F-I Series V5.2.0 build 140721 to V5.4.0 Build 160401, DS-2CD2xx2FWD Series V5.3.1 build 150410 to V5.4.4 Build 161125, DS-2CD4x2xFWD Series V5.2.0 build 140721 to V5.4.0 Build 160414, DS-2CD4xx5 Series V5.2.0 build 140721 to V5.4.0 Build 160421, DS-2DFx Series V5.2.0 build 140805 to V5.4.5 Build 160928, and DS-2CD63xx Series V5.0.9 build 140305 to V5.3.5 Build 160106 devices. The improper authentication vulnerability occurs when an application does not adequately or correctly authenticate users. This may allow a malicious user to escalate his or her privileges on the system and gain access to sensitive information.

CRITICAL9.8
100%p100
KEVFunctional
2026-06-17
CVE-2025-3248

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

CRITICAL9.8
100%p100
KEV+RWeaponized
2026-07-14
CVE-2025-53770

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

CRITICAL9.8
100%p100
KEV+RWeaponized
2026-08-04
CVE-2025-49704

Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

HIGH8.8
100%p100
KEV+RWeaponized
2026-06-17
CVE-2025-49706

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

MEDIUM6.5
100%p100
KEV+RWeaponized
2026-08-04
CVE-2021-33044

The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.

CRITICAL9.8
100%p100
KEVPoC
2026-06-17
CVE-2025-55182

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

CRITICAL10.0
100%p100
KEV+RWeaponized
2026-08-04
CVE-2025-48703

CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1205 allows unauthenticated remote code execution via shell metacharacters in the t_total parameter in a filemanager changePerm request. A valid non-root username must be known.

CRITICAL9.0
100%p100
KEVPoC
2026-06-17
CVE-2026-21509

Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally.

HIGH7.8
72%p99
KEVPoC
2026-07-30
CVE-2026-42897

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

MEDIUM6.1
70%p99
KEVPoC
2026-06-19
CVE-2025-21042

Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.

CRITICAL9.8
33%p98
KEVPoC
2026-06-17
CVE-2025-0994

Trimble Cityworks versions prior to 15.8.9 and Cityworks with office companion versions prior to 23.10 are vulnerable to a deserialization vulnerability. This could allow an authenticated user to perform a remote code execution attack against a customer’s Microsoft Internet Information Services (IIS) web server.

HIGH8.8
31%p98
KEVPoC
2026-06-17
CVE-2024-40766

An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash. This issue affects SonicWall Firewall Gen 5 and Gen 6 devices, as well as Gen 7 devices running SonicOS 7.0.1-5035 and older versions.

CRITICAL9.8
18%p97
KEV+R
2026-06-17