Command Injection in Management Control Functions
Welotec TK102L, TK102W and TK100 routers before 3.5.116, TK500-v2 routers before 1.0.124 and TK500-v3 routers before 1.0.123 are affected. Upgrading to those versions fixes the issue.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 3.5.116, 1.0.124, 1.0.123
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Welotec TK102L, TK102W and TK100 routers with versions before 3.5.116 Welotec TK500-v2 based routers (TK525L-v2, TK525L-W-v2, TK525W-v2, TK535L1-v2) with versions before 1.0.124 Welotec TK500-v3 based routers (TK525L-v3, TK525L-W-G-v3, TK525L-IO-v3, TK525L-W-v3, TK525W-v3, TK555L-v3) with versions before 1.0.123
- Exploitation?/40Exploitation: unknown (data gap). No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity8.6/10CVSS 8.6
- No patch0/5No signal
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
CVE-2026-105978 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.6 (high) and affects TK100, TK500-v2 and TK500-v3; fixed in 3.5.116, 1.0.124 and 1.0.123.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.36% · 29th percentile
- 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? →
- 17/100 · 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
- Fix
- Fixed in 3.5.116, 1.0.124, 1.0.123
- 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
This vulnerability affects the management control functions of a software product, which is affected by improper input validation. A remote attacker who already holds high privileges could exploit it to run arbitrary operating system commands with root-level access.
Read the original description
Improper input validation in management control functions may allow a remote attacker with high privileges to inject operating system commands and execute them with root privileges.
What to do
Check whether your setup matches what the bug needs.
Welotec TK102L, TK102W and TK100 routers with versions before 3.5.116 Welotec TK500-v2 based routers (TK525L-v2, TK525L-W-v2, TK525W-v2, TK535L1-v2) with versions before 1.0.124 Welotec TK500-v3 based routers (TK525L-v3, TK525L-W-G-v3, TK525L-IO-v3, TK525L-W-v3, TK525W-v3, TK555L-v3) with versions before 1.0.123Upgrade to a fixed version: 3.5.116, 1.0.124, 1.0.123.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- Welotec TK100
From 0.0.0 · fixed in 3.5.116
- Welotec TK500-v2
From 0.0.0 · fixed in 1.0.124
- Welotec TK500-v3
From 0.0.0 · fixed in 1.0.123
Evidence 1
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-105978
Is CVE-2026-105978 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?
Improper input validation in the management control functions lets a remote attacker with high privileges inject operating system commands. The injected commands run with root privileges, which gives full control of the device.Source: certvde.com
Which versions are affected by CVE-2026-105978?
TK100: from 0.0.0 before 3.5.116. TK500-v2: from 0.0.0 before 1.0.124. TK500-v3: from 0.0.0 before 1.0.123.Source: cve.now feed data
Am I affected, and how do I check?
Welotec TK102L, TK102W and TK100 routers before 3.5.116, TK500-v2 based routers (TK525L-v2, TK525L-W-v2, TK525W-v2, TK535L1-v2) before 1.0.124, and TK500-v3 based routers (TK525L-v3, TK525L-W-G-v3, TK525L-IO-v3, TK525L-W-v3, TK525W-v3, TK555L-v3) before 1.0.123. Check the firmware version installed on the device and compare it with these versions.Source: certvde.com
How do I fix CVE-2026-105978?
Upgrade TK100 routers to 3.5.116 or later, TK500-v2 routers to 1.0.124 or later, and TK500-v3 routers to 1.0.123 or later.Source: certvde.com