Tasmota 16.0.0 CSRF via Referer Header Validation Bypass
Tasmota through 16.0.0 is affected when a device lacks a WebPassword. No vendor rating is given. The fix is in commit 1cb7ebc.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fix or patch referenced
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Tasmota through 16.0.0 is affected, fixed in commit 1cb7ebc The device lacks a WebPassword
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 20/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Tasmota firmware contains a cross-site request forgery flaw that lets an attacker bypass its Referer-based protection. It can be reached remotely, without logging in, if an administrator on the device's network is lured to a malicious page. A successful attack can issue arbitrary console commands and change Wi-Fi, MQTT, settings, or firmware on devices that lack a WebPassword.
Read the original description
Tasmota through 16.0.0, fixed in commit 1cb7ebc, contains a cross-site request forgery vulnerability that allows unauthenticated attackers to bypass Referer-based CSRF protection in HttpCheckPriviledgedAccess() by crafting a Referer header where the device hostname or IP appears as a substring immediately after http://.evil.com/. Attackers can lure an administrator on the device's network to a malicious page to issue arbitrary console commands and reconfigure Wi-Fi, MQTT, settings, or firmware on devices lacking a WebPassword.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure12/25Specific setups only, reachable over the network without a login
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.5/10CVSS 7.5
- No patch0/5No signal
What would change the score
- Would score about 70 if added to CISA KEV
- Would score about 65 if CISA's SSVC rates exploitation active
What to do
Check whether your setup matches what the bug needs.
Tasmota through 16.0.0 is affected, fixed in commit 1cb7ebc The device lacks a WebPasswordApply the patch listed under Evidence.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- arendst Tasmota
through 16.0.0
Evidence 2
- Patch
- Link
Corrections
None so far.
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Questions about CVE-2026-119755
Is CVE-2026-119755 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Tasmota's Referer header validation can be bypassed, which enables cross-site request forgery against the device's web interface. An attacker can issue arbitrary console commands and reconfigure Wi-Fi, MQTT, settings, or firmware.Source: vulncheck.com
Which versions are affected by CVE-2026-119755?
Tasmota: through 16.0.0.Source: cve.now feed data
Am I affected, and how do I check?
Tasmota through version 16.0.0 is listed as affected, and the flaw concerns devices lacking a WebPassword. To check a device, compare its firmware version with 16.0.0 and look at whether a WebPassword is set in its web interface configuration.Source: vulncheck.com
How do I fix CVE-2026-119755?
Update to a Tasmota build that includes commit 1cb7ebc, which is the fix named in the sources. The sources do not name a specific fixed release version.Source: vulncheck.com