How severe is CVE-2022-29878?

CVE-2022-29878 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-29878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-29878?

CVE-2022-29878 primarily affects Siemens 7kg8500-0aa00-0aa0 Firmware. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-29878?

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.

When was CVE-2022-29878 published?

CVE-2022-29878 was published on 2022-05-20 and last updated on 2026-06-17.

CVE-2022-29878

CVE-2022-29878 is a high-severity vulnerability in Siemens 7kg8500-0aa00-0aa0 Firmware with a CVSS 3.x base score of 7.5. 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 7.5)
CVSS v2: 6.8
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Siemens 7kg8500-0aa00-0aa0 Firmware
Published: 2022-05-20
Last modified: 2026-06-17

Description

A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices use a limited range for challenges that are sent during the unencrypted challenge-response communication. An unauthenticated attacker could capture a valid challenge-response pair generated by a legitimate user, and request the webpage repeatedly to wait for the same challenge to reappear for which the correct response is known. This could allow the attacker to access the management interface of the device.

Frequently asked questions

What is CVE-2022-29878?: A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices use a limited range for challenges that are sent during the unencrypted challenge-response communication. An unauthenticated attacker could capture a valid challenge-response pair generated by a legitimate user, and request the webpage repeatedly to wait for the same challenge to reappear for which the correct response is known. This could allow the attacker to access the management interface of the device.
How severe is CVE-2022-29878?: CVE-2022-29878 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-29878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-29878?: CVE-2022-29878 primarily affects Siemens 7kg8500-0aa00-0aa0 Firmware. In total, 36 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-29878?: 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.
When was CVE-2022-29878 published?: CVE-2022-29878 was published on 2022-05-20 and last updated on 2026-06-17.

References

Affected products (36)

cpe:2.3:o:siemens:7kg8500-0aa00-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8500-0aa00-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8500-0aa10-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8500-0aa10-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8500-0aa30-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8500-0aa30-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa01-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa01-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa02-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa02-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa11-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa11-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa12-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa12-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa31-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa31-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa32-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8501-0aa32-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa00-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa00-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa10-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa10-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa30-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8550-0aa30-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa01-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa01-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa02-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa02-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa11-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa11-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa12-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa12-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa31-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa31-2aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa32-0aa0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:7kg8551-0aa32-2aa0_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens 7kg8500-0aa00-0aa0 Firmware

CVE-2022-41665 — Critical (CVSS 9.8): A vulnerability has been identified in SICAM P850 (7KG8500-0AA00-0AA0) (All versions < V3.10), SICAM P850…
CVE-2022-29873 — Critical (CVSS 9.8): A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices do not properly validate…
CVE-2022-29874 — High (CVSS 8.8): A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices do not encrypt web traffic with…
CVE-2022-29872 — High (CVSS 8.8): A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices do not properly validate…
CVE-2022-40226 — High (CVSS 7.5): A vulnerability has been identified in SICAM P850 (7KG8500-0AA00-0AA0) (All versions < V3.10), SICAM P850…
CVE-2022-29882 — High (CVSS 7.1): A vulnerability has been identified in SICAM T (All versions < V3.0). Affected devices do not handle uploaded files…

All CVEs affecting Siemens 7kg8500-0aa00-0aa0 Firmware →

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 →