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CVE-2019-5274· NVD / CVE Program· CNA huawei

USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability.

USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability. Due to a flaw in the X.509 implementation in the affected products which can result in an infinite loop, an attacker may exploit the vulnerability via a malicious certificate to perform a denial of service attack on the affected products.

HighCVSS 7.5 · v3.1—No exploit No fix recorded

Noroxi analysis

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Published
Dec 26, 2019
Updated
Jun 16, 2026
EPSS
0.5% · 39th percentile
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Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

Affected systems

VendorProduct
huaweiusg9500 firmware
huaweiusg9500

Affected versions

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

  • huawei usg9500 firmwarev500r001c30
  • huawei usg9500 firmwarev500r001c60

Versions reported by the vendor

Affected version ranges reported by the assigning authority (huawei). Independent of NVD's CPE analysis and usually ahead of it.

  • Huawei USG9500

    • V500R001C30, V500R001C60affected

Same product

huawei: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-1871USG9500 with software of V500R001C30SPC100; V500R001C30SPC200; V500R001C30SPC600; V500R001C60SPC500; V500R005C00SPC100; V500R005C00SPC200 ha
    32Monitor
  • CVE-2021-22309There is insecure algorithm vulnerability in Huawei products.
    30Monitor
  • CVE-2019-5275USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability.
    30Monitor
  • CVE-2019-5273USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability.
    30Monitor
  • CVE-2017-8167Huawei firewall products USG9500 V500R001C50 has a DoS vulnerability.A remote attacker who controls the peer device could exploit the vulner
    30Monitor
  • CVE-2020-9212There is a vulnerability in some version of USG9500 that the device improperly handles the information when a user logs in to device.
    26Monitor

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.

No credits in the CNA record.

Variant candidates

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

No nightly-computed relations.

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.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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