CVE-2026-11556Exploit

MEDIUMCVSS 7.4 · HIGH

Exploit discussion active in current signal (2 latest mentions)

Immediate actions

Patch affected systems immediately
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

A security flaw has been discovered in Tenda F451 1.0.0.7/1.0.0.9. Impacted is the function formWriteFacMac of the file /goform/WriteFacMac of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

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4.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-77CWE-78

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Threat summary

Public PoC and exploit tooling are both present
Patch or workaround signal is available
3 mentions across 2 observed days
Momentum state: stable

What's happening

Exploit tool or code specified in 1 signal
PoC mentioned or linked in 3 signals
Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Peaked at 2 mentions on most recent observed day (2026-06-14)
3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Exploit

266.7%

Patch

133.3%

Referenced assets1 URL

By indicator

https://www.valtersit.com/cve/CVE-2026-11556

Classification over time

Date	Total	Labels

2026-06-09	1	Patch1
2026-06-14	2	Exploit2

Full discourse3 posts

YogSotho@YogSoth0132d
Exploit
Next Exploit: Tenda F451 — Multi-CVE Exploitation Framework CVE-2026-11556: WriteFacMac command injection (mac parameter) CVE-2026-11557: Stack overflow chain (fast_setting_wifi_set) Soon on gibliz 0days #exploit #0days #CVE #CVSS #security #hacking https://t.co/hWKztp100F
Post summary
The post announces an upcoming exploitation framework for Tenda F451, detailing two CVEs involving command injection and a stack overflow chain, and provides a link that likely contains PoC code.
0401961.2K
1.8K followersView on X
YogSotho@YogSoth0132d
Exploit
New exploits: **predator_w6x_upgraded.zip** | CVE-49195, CVE-49196, CVE-49199 **tenda_cx12l_upgraded.zip** | CVE-2026-11503, CVE-2026-11504 **tenda_f451_upgraded.zip** | CVE-2026-11556, CVE-2026-11557 **cisco_20230_upgraded.zip** | CVE-2026-20230 **tplink_archer_20269151_upgraded.zip** | CVE-2026-9151 #exploit #0days #CVE #CVSS #security #hacking
Post summary
A tweet announces the release of zip files containing functional exploit code for several CVEs, yet it provides no evidence of ongoing exploitation or patching.
111187769
1.8K followersView on X
Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters137d
Patch
CVE-2026-11556 - OS Command Injection in Tenda F451. Affects formWriteFacMac via mac argument. CVSS 8.8. Public exploit available. Unpatched. Disable remote management. #CVE #Tenda #InfoSec our PATCH available for FREE forever https://www.valtersit.com/cve/CVE-2026-11556
Post summary
The post announces CVE-2026-11556 (an OS command injection in Tenda F451), notes a public exploit and CVSS 8.8, and offers a free patch with a recommendation to disable remote management.
0000045
921 followersView on X

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