CVE-2024-41996Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expe…
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It affects diffie-hellman_key_exchange_project diffie-hellman_key_exchange and 18 other products. Add what you run to find out whether that includes you.
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Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE and validate the order of the public key.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
diffie-hellman_key_exchange_project diffie-hellman_key_exchange diffie-hellman_key_exchange_project:diffie-hellman_key_exchange | all versions | CISA ADP |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCH328 siemens:scalance_xch328 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM324 siemens:scalance_xcm324 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM328 siemens:scalance_xcm328 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XCM332 siemens:scalance_xcm332 (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) siemens:scalance_xrh334_24_v_dc_8xfo_cc (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230 V AC, 12xFO) siemens:scalance_xrm334_230_v_ac_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230 V AC, 8xFO) siemens:scalance_xrm334_230_v_ac_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_230v_ac_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24 V DC, 12xFO) siemens:scalance_xrm334_24_v_dc_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24 V DC, 8xFO) siemens:scalance_xrm334_24_v_dc_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_24v_dc_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) siemens:scalance_xrm334_2x230_v_ac_12xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) siemens:scalance_xrm334_2x230_v_ac_8xfo (from the name) | before V3.3 | CISA ADP |
Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) siemens:scalance_xrm334_2x230v_ac_2x10g_24xsfp_8xsfp+ (from the name) | before V3.3 | CISA ADP |
Siemens SIDIS Prime siemens:sidis_prime (from the name) | before V4.0.800 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
References
- https://gist.github.com/c0r0n3r/abccc14d4d96c0442f3a77fa5ca255d1
- https://dheatattack.gitlab.io/details/
- https://dheatattack.gitlab.io/faq/
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-485750.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.