CVE-2024-43099
CVE-2024-43099 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (19th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-40035
- Weakness: CWE-294
- Published:
- Last modified:
Description
The session hijacking attack targets the application layer's control mechanism, which manages authenticated sessions between a host PC and a PLC. During such sessions, a session key is utilized to maintain security. However, if an attacker captures this session key, they can inject traffic into an ongoing authenticated session. To successfully achieve this, the attacker also needs to spoof both the IP address and MAC address of the originating host which is typical of a session-based attack.
Frequently asked questions
- What is CVE-2024-43099?
- The session hijacking attack targets the application layer's control mechanism, which manages authenticated sessions between a host PC and a PLC. During such sessions, a session key is utilized to maintain security. However, if an attacker captures this session key, they can inject traffic into an ongoing authenticated session. To successfully achieve this, the attacker also needs to spoof both the IP address and MAC address of the originating host which is typical of a session-based attack.
- How severe is CVE-2024-43099?
- CVE-2024-43099 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2024-43099 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2024-43099?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2024-43099 have an EU (EUVD) identifier?
- Yes. CVE-2024-43099 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40035.
- When was CVE-2024-43099 published?
- CVE-2024-43099 was published on 2024-09-13 and last updated on 2026-06-17.
References
Other CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities
- CVE-2025-49752 — Critical (CVSS 10.0): Azure Bastion Elevation of Privilege Vulnerability
- CVE-2026-88278 — Critical (CVSS 9.8): GeoVision GV-LPC2211 V1.13 fails to enforce WS-Security UsernameToken freshness or nonce reuse protection, allowing a…
- CVE-2026-86219 — Critical (CVSS 9.8): Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified…
- CVE-2026-65905 — Critical (CVSS 9.8): Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize…
- CVE-2026-68079 — Critical (CVSS 9.8): In Apache CXF's DefaultEncryptingCodeDataProvider, a captured authorization code can be redeemed an unlimited number…
- CVE-2026-28564 — Critical (CVSS 9.8): Insufficient Session Expiration, Authentication Bypass by Capture-replay vulnerability in Apache IoTDB. REST Basic…
Browse all CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities →