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NVD / CVE Program· CNA huawei

CVE-2021-22356: There is a weak secure algorithm vulnerability in Huawei products.

Noroxi assessment

Priority: Monitor (action score 23/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • According to the record, no fixed version is available yet.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

There is a weak secure algorithm vulnerability in Huawei products. A weak secure algorithm is used in a module. Attackers can exploit this vulnerability by capturing and analyzing the messages between devices to obtain information. This can lead to information leak.Affected product versions include: IPS Module V500R005C00SPC100, V500R005C00SPC200; NGFW Module V500R005C00SPC100, V500R005C00SPC200; Secospace USG6300 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; Secospace USG6500 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; Secospace USG6600 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; USG9500 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200.

MediumCVSS 5.9 · v3.1—No exploit No fix recorded
Published
Nov 23, 2021
Updated
Jun 16, 2026
EPSS
0.4% · 35th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-22356

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
huaweiips module firmware
huaweiips module
huaweingfw module firmware
huaweingfw module
huaweisecospace usg6300 firmware
huaweisecospace usg6300
huaweisecospace usg6500 firmware
huaweisecospace usg6500
huaweisecospace usg6600 firmware
huaweisecospace usg6600
huaweiusg9500 firmware
huaweiusg9500

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This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.

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Affected versions

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

  • huawei ips module firmwarev500r005c00spc100
  • huawei ips module firmwarev500r005c00spc200
  • huawei ngfw module firmwarev500r005c00spc100
  • huawei ngfw module firmwarev500r005c00spc200
  • huawei secospace usg6300 firmwarev500r001c30spc200
  • huawei secospace usg6300 firmwarev500r001c30spc600
  • huawei secospace usg6300 firmwarev500r001c60spc500
  • huawei secospace usg6300 firmwarev500r005c00spc100
  • huawei secospace usg6300 firmwarev500r005c00spc200
  • huawei secospace usg6500 firmwarev500r001c30spc200
  • huawei secospace usg6500 firmwarev500r001c30spc600
  • huawei secospace usg6500 firmwarev500r001c60spc500
  • huawei secospace usg6500 firmwarev500r005c00spc100
  • huawei secospace usg6500 firmwarev500r005c00spc200
  • huawei secospace usg6600 firmwarev500r001c30spc200
  • huawei secospace usg6600 firmwarev500r001c30spc600
  • huawei secospace usg6600 firmwarev500r001c60spc500
  • huawei secospace usg6600 firmwarev500r005c00spc100
  • huawei secospace usg6600 firmwarev500r005c00spc200
  • huawei usg9500 firmwarev500r001c30spc200

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.

  • n/a IPS Module;NGFW Module;Secospace USG6300;Secospace USG6500;Secospace USG6600;USG9500

    • V500R005C00SPC100,V500R005C00SPC200, V500R001C30SPC200,V500R001C30SPC600,V500R001C60SPC500,V500R005C00SPC100,V500R005C00SPC200affected

Same product

huawei: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-9099Huawei products IPS Module; NGFW Module; NIP6300; NIP6600; NIP6800; Secospace USG6300; Secospace USG6500; Secospace USG6600; USG9500 with ve
    39Monitor
  • CVE-2021-37129There is an out of bounds write vulnerability in some Huawei products.
    30Monitor
  • CVE-2021-22320There is a denial of service vulnerability in Huawei products.
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-22342Jun 22, 2021 · There is an information leak vulnerability in Huawei products.
    19Monitor
  • ← EarlierCVE-2021-22341Jun 29, 2021 · There is a memory leak vulnerability in Huawei products.
    19Monitor
  • Later →CVE-2020-1818Dec 27, 2024 · There are multiple out of bounds (OOB) read vulnerabilities in the implementation of the Common Open Policy Service (COPS) protocol of some
    21Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-327 · Use of a Broken or Risky Cryptographic Algorithm

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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