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CVE-2024-29973

85
FAUCET Score

CVE-2024-29973 is a critical command injection vulnerability in Zyxel NAS326 and NAS542 firmware that allows an unauthenticated attacker to execute OS commands by sending a crafted HTTP POST request to the "setCookie" parameter. With a CVSS score of 9.8 (CRITICAL), it presents a severe threat due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While not yet in CISA's KEV catalog, exploit intelligence indicates Nuclei templates exist, and community discussion and media coverage suggest active exploitation by botnets, even on end-of-life devices.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.21\(aazf.17\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*
< 5.21\(abag.14\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
86.09%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2024-29973 · Jun 19, 2024
This CVE's current EPSS score of 0.8609 is in the 99th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

outpost24.com / blog/zyxel-nas-critical-vulnerabilities
ExploitThird Party Advisory
zyxel.com / global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-nas-products-06-04-2024
Vendor Advisory