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CVE-2024-9197· NVD / CVE Program· CNA Zyxel

A post-authentication buffer overflow vulnerability in the parameter "action" of the CGI program in Zyxel VMG3625-T50B firmware versions thr

A post-authentication buffer overflow vulnerability in the parameter "action" of the CGI program in Zyxel VMG3625-T50B firmware versions through V5.50(ABPM.9.2)C0 could allow an authenticated attacker with administrator privileges to cause a temporary denial of service (DoS) condition against the web management interface by sending a crafted HTTP GET request to a vulnerable device if the function ZyEE is enabled.

MediumCVSS 4.9 · v3.1—No exploit No fix recorded

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Published
Dec 2, 2024
Updated
Jun 17, 2026
EPSS
0.5% · 41th percentile
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Report tools

JSON

Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Zyxel
4.9
NVD has not scored this yet; the score shown is the CNA’s.

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

Affected systems

VendorProduct
zyxeldx3300-t0 firmware
zyxeldx3300-t0
zyxeldx3300-t1 firmware
zyxeldx3300-t1
zyxeldx3301-t0 firmware
zyxeldx3301-t0
zyxeldx4510-b0 firmware
zyxeldx4510-b0
zyxeldx4510-b1 firmware
zyxeldx4510-b1
zyxeldx5401-b0 firmware
zyxeldx5401-b0

and 60 more

Affected versions

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

  • zyxel ax7501-b0 firmwarebefore 5.17\(abpc.5.3\)c0
  • zyxel ax7501-b1 firmwarebefore 5.17\(abpc.5.3\)c0
  • zyxel dx3300-t0 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel dx3300-t1 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel dx3301-t0 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel dx4510-b0 firmwarebefore 5.17\(abyl.8\)c0
  • zyxel dx4510-b1 firmwarebefore 5.17\(abyl.8\)c0
  • zyxel dx5401-b0 firmwarebefore 5.17\(abyo.6.4\)c0
  • zyxel dx5401-b1 firmwarebefore 5.17\(abyo.6.4\)c0
  • zyxel ee6510-10 firmwarebefore 5.19\(acjq.1\)c0
  • zyxel emg3525-t50b firmwarebefore 5.50\(abpm.9.3\)c0
  • zyxel emg5523-t50b firmwarebefore 5.50\(abpm.9.3\)c0
  • zyxel emg5723-t50k firmwarebefore 5.50\(abom.8.5\)c0
  • zyxel ex3300-t0 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel ex3300-t1 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel ex3301-t0 firmwarebefore 5.50\(aby.5.4\)c0
  • zyxel ex3500-t0 firmwarebefore 5.44\(achr.3\)c0
  • zyxel ex3501-t0 firmwarebefore 5.44\(achr.3\)c0
  • zyxel ex3510-b0 firmwarebefore 5.17\(abup.13\)c0
  • zyxel ex3510-b1 firmwarebefore 5.17\(abup.13\)c0

Versions reported by the vendor

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

  • Zyxel VMG3625-T50B firmware

    • <= V5.50(ABPM.9.2)C0affected

Same product

zyxel: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-12009A post-authentication command injection vulnerability in the "ZyEE" function of the Zyxel EX5601-T1 firmware version V5.70(ACDZ.3.6)C0 and e
    28Monitor
  • CVE-2024-38266An improper restriction of operations within the bounds of a memory buffer in the parameter type parser of the Zyxel VMG8825-T50K firmware v
    19Monitor

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.
  • Administrator privileges are 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
High
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

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

nvd-secondary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
char buf[256];memcpy(buf, pkt->data, pkt->len);

Fixed

c
char buf[256];if (pkt->len > sizeof(buf)) {  return -EINVAL;}memcpy(buf, pkt->data, pkt->len);

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