Tenda 4G300 sub_422AA4 stack-based overflow
A vulnerability was found in Tenda 4G300 1.01.42 and classified as critical. Affected by this issue is the function sub_422AA4. The manipulation of the argument year/month/day/hour/minute/second leads to stack-based buffer overflow. The attack may be launched remotely. VDB-261986 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- Published
- Apr 25, 2024
- Updated
- Jun 17, 2026
- EPSS
- 1.8% · 77th percentile
- CWE
- CWE-121
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 8.8
- CNA · VulDB
- 8.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- tenda 4g300 firmware1.01.42
Versions reported by the vendor
Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.
Tenda 4G300
- 1.01.42affected
Same product
tenda: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-38929Tenda 4G300 v1.01.42 was discovered to contain a stack overflow via the page parameter at /VirtualSer.39Monitor
- CVE-2024-4170Tenda 4G300 sub_429A30 stack-based overflow36Monitor
- CVE-2024-4169Tenda 4G300 sub_4279CC stack-based overflow36Monitor
- CVE-2024-4168Tenda 4G300 sub_4260F0 stack-based overflow36Monitor
- CVE-2024-4166Tenda 4G300 sub_41E858 stack-based overflow36Monitor
- CVE-2026-7470Tenda 4G300 SafeMacFilter sub_427C3C stack-based overflow29Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- wxhwxhwxh_mie (VulDB User)reporter
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2024-41660 days apartTenda 4G300 sub_41E858 stack-based overflow36Monitor
- CVE-2024-41680 days apartTenda 4G300 sub_4260F0 stack-based overflow36Monitor
- CVE-2024-41690 days apartTenda 4G300 sub_4279CC stack-based overflow36Monitor
- CVE-2024-41700 days apartTenda 4G300 sub_429A30 stack-based overflow36Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-121 · Stack-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.