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CVE-2026-1139· NVD / CVE Program· CNA VulDB

UTT 进取 520W ConfigExceptMSN strcpy buffer overflow

A vulnerability has been found in UTT 进取 520W 1.7.7-180627. This vulnerability affects the function strcpy of the file /goform/ConfigExceptMSN. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

HighCVSS 7.4 · v4.0—No exploit No fix recorded
Published
Jan 19, 2026
Updated
Jun 17, 2026
EPSS
1.0% · 61th percentile
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Report tools

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Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulDB
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
utt520w firmware
utt520w

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • utt 520w firmwareup to 1.7.7-180627 inclusive

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.

  • UTT 进取 520W

    • 1.7.7-180627affected

Same product

utt: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31059A remote command execution (RCE) vulnerability in the /goform/formDia component of UTT Aggressive HiPER 520W v3v1.7.7-180627 allows attacker
    39Monitor
  • CVE-2026-0841UTT 进取 520W formPictureUrl strcpy buffer overflow
    30Monitor
  • CVE-2026-0840UTT 进取 520W formConfigNoticeConfig strcpy buffer overflow
    30Monitor
  • CVE-2026-0838UTT 进取 520W ConfigWirelessBase strcpy buffer overflow
    30Monitor
  • CVE-2026-0837UTT 进取 520W formFireWall strcpy buffer overflow
    30Monitor
  • CVE-2026-2071UTT 进取 520W formP2PLimitConfig strcpy buffer overflow
    29Monitor

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.

EPSS, last 120 days

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-08378 days apartUTT 进取 520W formFireWall strcpy buffer overflow
    30Monitor
  • CVE-2026-08388 days apartUTT 进取 520W ConfigWirelessBase strcpy buffer overflow
    30Monitor
  • CVE-2026-08408 days apartUTT 进取 520W formConfigNoticeConfig strcpy buffer overflow
    30Monitor
  • CVE-2026-08418 days apartUTT 进取 520W formPictureUrl strcpy buffer overflow
    30Monitor
  • CVE-2026-11380 days apartUTT 进取 520W ConfigExceptQQ strcpy buffer overflow
    29Monitor
  • CVE-2026-11400 days apartUTT 进取 520W ConfigExceptAli strcpy buffer overflow
    29Monitor

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
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change 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.

All records