How severe is CVE-2021-41122?

CVE-2021-41122 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-41122 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41122?

CVE-2021-41122 affects Vyperlang Vyper. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41122?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41122 published?

CVE-2021-41122 was published on 2021-10-05 and last updated on 2026-06-17.

CVE-2021-41122

CVE-2021-41122 is a medium-severity vulnerability in Vyperlang Vyper with a CVSS 3.x base score of 4.3. 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-682.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-682
Affected product: Vyperlang Vyper
Published: 2021-10-05
Last modified: 2026-06-17

Description

Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions external functions did not properly validate the bounds of decimal arguments. The can lead to logic errors. This issue has been resolved in version 0.3.0.

Frequently asked questions

What is CVE-2021-41122?: Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions external functions did not properly validate the bounds of decimal arguments. The can lead to logic errors. This issue has been resolved in version 0.3.0.
How severe is CVE-2021-41122?: CVE-2021-41122 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-41122 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41122?: CVE-2021-41122 affects Vyperlang Vyper. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41122?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41122 published?: CVE-2021-41122 was published on 2021-10-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*

More vulnerabilities in Vyperlang Vyper

CVE-2024-24563 — Critical (CVSS 9.8): Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. Arrays can be keyed by a signed integer,…
CVE-2024-24561 — Critical (CVSS 9.8): Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.10 and earlier, the…
CVE-2025-27105 — Critical (CVSS 9.1): vyper is a Pythonic Smart Contract Language for the EVM. Vyper handles AugAssign statements by first caching the target…
CVE-2022-24845 — High (CVSS 8.8): Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In affected versions, the return of…
CVE-2022-29255 — High (CVSS 8.2): Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling…
CVE-2023-42443 — High (CVSS 8.1): Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). In version 0.3.9 and prior, under…

All CVEs affecting Vyperlang Vyper →

Other CWE-682 vulnerabilities

CVE-2023-2163 — Critical (CVSS 10.0): Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe,…
CVE-2026-1229 — Critical (CVSS 9.8): The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific…
CVE-2024-36736 — Critical (CVSS 9.8): An issue in the oneflow.permute component of OneFlow-Inc. Oneflow v0.9.1 causes an incorrect calculation when the same…
CVE-2022-30600 — Critical (CVSS 9.8): A flaw was found in moodle where logic used to count failed login attempts could result in the account lockout…
CVE-2021-44847 — Critical (CVSS 9.8): A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through…
CVE-2020-0221 — Critical (CVSS 9.8): Airbrush FW's scratch memory allocator is susceptible to numeric overflow. When the overflow occurs, the next…

Browse all CWE-682 vulnerabilities →